Business Taxation

Tax Tips For Expats Running A Business In The United Kingdom

Diving into the world of taxes might sound about as exciting as watching paint dry, but for expats running businesses in the United Kingdom, it’s as necessary as that first cup of coffee in the morning. Understanding the nuances of tax obligations can be the difference between smooth sailing and a stormy sea of financial chaos.

In this guide, we’ll unravel the complexities of tax residency, deductions, and those dreaded deadlines, so you can focus on what truly matters—growing your business.

From the moment you step onto UK soil with dreams of entrepreneurial success, the taxman is never far behind. But fear not, because by the end of this journey, you’ll be armed with the knowledge to tackle tax challenges head-on.

You’ll learn about the self-assessment system, national insurance contributions, VAT intricacies, and the benefits of double taxation agreements. So, grab your calculator and get ready to make tax your ally, not your adversary.

Understanding Tax Residency

Navigating the complexities of tax residency is crucial for expats running a business in the United Kingdom. Tax residency determines a person’s obligation to pay taxes in the UK, which can significantly impact a business’s financial planning and obligations. Understanding the criteria for tax residency, and how it affects expats differently from non-residents, is essential for efficient tax planning and compliance.In the UK, tax residency is assessed annually, using a set of criteria Artikeld in the Statutory Residence Test (SRT).

This test is designed to establish whether an individual is considered a tax resident within the UK for any given tax year, based on specific conditions and connections to the country.

Criteria for Determining Tax Residency in the UK

The Statutory Residence Test (SRT) is the primary method used to determine an individual’s tax residency status in the UK. This test evaluates a series of factors such as time spent in the UK and ties to the country, providing a structured approach to residency determination.

Key components of the SRT include:

  • Automatic Overseas Test:A person will automatically be considered a non-resident if they spend fewer than 16 days in the UK during the tax year and were a UK resident for one or more of the previous three tax years, or fewer than 46 days if they were not a UK resident for any of the previous three tax years.

  • Automatic UK Test:An individual is automatically considered a UK resident if they spend 183 days or more in the UK during the tax year, or have their only home in the UK for more than 90 days, spending at least 30 days there during the tax year.

  • Sufficient Ties Test:If neither of the above tests is conclusive, the SRT examines ties to the UK, like having close family, available accommodation, substantial work involvement, or spending 90 days or more in the UK in previous years.

Impact of Tax Residency on Expats Running a Business

Understanding tax residency is essential for expats, as it directly influences their tax liabilities concerning their business operations. Being classified as a UK tax resident implies being subject to UK taxation on worldwide income and gains, which can have significant implications for an expat’s business and personal finances.Expats running a business in the UK need to consider not only their own residency status but also the structure of their business.

For instance, an expat with a sole proprietorship will include business profits in their personal tax returns, while those with limited companies may face different tax obligations depending on where the company is incorporated and the location of its business activities.

Tax Implications for Residents vs. Non-Residents

The tax obligations for residents and non-residents diverge notably, which can influence strategic decisions for expats operating a business in the UK. Here’s a breakdown of the implications:

  • Residents:UK residents are taxed on their worldwide income, which means that income earned both within and outside the UK is subject to UK taxation. This universal taxation approach requires careful planning to avoid double taxation, potentially utilizing tax reliefs and exemptions.

  • Non-Residents:Non-residents are generally liable to UK tax only on their UK-sourced income. This might include income from UK-based employment, rental income from UK properties, and profits from UK business activities. Non-residents must ensure compliance with local tax laws in their country of residence to mitigate international tax conflicts.

Understanding and properly determining your tax residency status can significantly impact your fiscal responsibilities and overall business strategy in the UK.

By comprehensively grasping these aspects, expats can ensure they align their business practices with UK tax obligations, optimizing their financial outcomes while remaining compliant with local laws.

Self-Assessment System

The Self-Assessment System in the United Kingdom is the process through which individuals and businesses report their income and calculate their tax obligations to HM Revenue and Customs (HMRC). This system is essential for expats running a business in the UK, as it ensures compliance with UK tax laws and enables the government to collect the necessary revenues efficiently.

Understanding this system is crucial for expats to avoid potential penalties and to manage their financial responsibilities effectively.Registering for self-assessment is a critical step for anyone engaging in taxable activities in the UK. Whether you are a sole trader, a partner in a business, or have other sources of income that require you to complete a tax return, registering ensures that you are on HMRC’s radar and can submit your tax returns on time.

Registering for Self-Assessment

To register for self-assessment, individuals and businesses must complete the registration process with HMRC. This process is vital to ensure that one is legally compliant and can properly report earnings and pay taxes.

  • Online Registration: Most people can register online via the HMRC website. You will need to provide personal details, National Insurance number, and other relevant information about your business activities.
  • Unique Taxpayer Reference (UTR): Upon registration, you will receive a 10-digit UTR, which you will use in all future correspondence with HMRC.
  • Deadline for Registration: You must register by October 5th following the end of the tax year during which you started your business or earned income that necessitates self-assessment.

Deadlines for Filing and Paying Taxes

There are specific deadlines that taxpayers must adhere to in order to remain compliant and avoid penalties. These deadlines are critical for financial planning and ensuring that tax affairs are in order.

  • Paper Tax Returns: The deadline for filing paper tax returns is October 31st following the end of the tax year.
  • Online Tax Returns: The deadline for filing online tax returns is January 31st following the end of the tax year.
  • Payment Deadline: Any tax owed must be paid by January 31st, coinciding with the online filing deadline. Payments on account may be due on July 31st.

Penalties for Late Submission and Payment

Failure to meet the filing and payment deadlines can result in significant penalties. Understanding these penalties is crucial to mitigating financial risks associated with late submissions.

  • Initial Penalty: A late filing incurs an automatic £100 penalty if the return is up to three months late.
  • Additional Penalties: Beyond three months, daily penalties of £10 per day are imposed, up to a maximum of £900. Further penalties are incurred if filings are six or twelve months late.
  • Late Payment Penalty: A percentage of the unpaid tax is charged as a penalty, increasing the longer the payment is overdue; 5% of the unpaid tax after 30 days, with further 5% charges at six and twelve months.

Understanding these timelines and penalties is essential for ensuring compliance and avoiding unnecessary costs. Proper preparation and timely submission are key components of effective tax management for expats running a business in the UK.

National Insurance Contributions

National Insurance Contributions (NICs) are payments made by employees, employers, and the self-employed. They are an essential part of the UK’s tax system, contributing to the funding of state benefits. For expats running a business in the UK, understanding NICs is crucial, as it directly influences their financial planning and obligations.Expats who own businesses in the UK need to familiarize themselves with the types of NICs applicable to them, how these contributions affect their business operations, and the methods available for calculating and paying NICs.

Types of National Insurance Contributions Applicable to Expats

The UK National Insurance system categorizes contributions into several classes. Each class has specific implications and requirements for expats who are either employees, self-employed, or business owners.

  • Class 1 Contributions:These are paid by employed workers and their employers. Expats employed in the UK will have these contributions automatically deducted from their salaries, while their employers pay an additional percentage.
  • Class 2 Contributions:These are flat-rate contributions for self-employed individuals. Expats operating a business in the UK should be aware that Class 2 contributions are mandatory if their profits exceed a certain threshold.
  • Class 3 Contributions:Voluntary contributions designed for individuals who wish to fill gaps in their national insurance record to qualify for state benefits.
  • Class 4 Contributions:These are based on profits and are payable by self-employed individuals whose profits exceed a specified limit. They are calculated as a percentage of profits.

Impact of National Insurance Contributions on Business Owners

NICs have a significant impact on business owners, influencing both personal and business finances.NICs are a key consideration for business owners when planning their financial strategy. They not only affect the net income of self-employed expats but also represent a cost that must be accounted for in business budgets.

Additionally, failure to comply with NIC obligations can lead to penalties, adding an administrative burden to business operations.

Calculating and Paying National Insurance

Understanding the calculation and payment process for NICs ensures compliance and financial accuracy for expat business owners.Calculating NICs involves determining the applicable class based on employment status and income level. For employed individuals, NICs are typically deducted by the employer through the Pay As You Earn (PAYE) system.

Self-employed expats must calculate their contributions based on their annual tax return.

  • Class 1 contributions are deducted through payroll systems, leveraging the PAYE system.
  • Class 2 and Class 4 contributions are assessed through the self-assessment tax return process. It’s vital for self-employed expats to keep accurate records of profits and ensure timely submissions.
  • Voluntary Class 3 contributions can be arranged directly with HM Revenue and Customs (HMRC) to ensure gaps in contributions are filled.

Important: Regularly review your NICs status and contributions to ensure compliance and avoid unexpected liabilities.

Expats should utilize available resources, such as the HMRC online services, to streamline the process of calculating and paying NICs, thereby ensuring they meet all their tax obligations efficiently.

Value Added Tax (VAT)

Value Added Tax (VAT) is a consumption tax levied on the value added to goods and services. In the United Kingdom, businesses must understand the rules and regulations around VAT to ensure compliance and optimize their financial operations. Knowing the VAT registration threshold and understanding the process is crucial for expats running a business in the UK.When businesses exceed a certain turnover threshold, they are required to register for VAT.

This registration brings about responsibilities, including charging VAT on sales, collecting it from customers, and remitting it to HM Revenue and Customs (HMRC).

VAT Registration Threshold and Process

In the UK, the VAT registration threshold is a critical figure for businesses. The threshold is the turnover amount at which a business must register for VAT, which, as of 2023, is £85,000 over a 12-month period. This threshold ensures that small businesses are not unnecessarily burdened with administrative duties.

  • Businesses exceeding this threshold must register with HMRC for VAT.
  • Registration can be done online through the HMRC website.
  • Once registered, businesses receive a VAT registration number and must start charging VAT to their customers.

Charging, Collecting, and Remitting VAT

Charging, collecting, and remitting VAT correctly is essential for compliance and accurate financial management. Once registered, businesses must apply the correct VAT rate to their goods or services, collect this tax from customers, and remit it to HMRC.

  • Standard VAT rate in the UK is 20%, but reduced rates of 5% or 0% apply to certain goods and services.
  • Businesses must issue VAT invoices that detail the amount of VAT charged.
  • Collected VAT must be remitted to HMRC, usually on a quarterly basis.

Preparing a VAT Return

Preparing a VAT return is an essential part of the VAT process for businesses. A VAT return summarizes the total sales and purchases a business has made and the amount of VAT owed to or reclaimable from HMRC. Below is an example of how to prepare a VAT return using an HTML table format:

To ensure accuracy, businesses should maintain detailed records of all transactions and VAT charges.

Date Item VAT Rate Amount
01/01/2023 Office Supplies 20% £120.00
15/01/2023 Consulting Services 5% £210.00
28/01/2023 Software Subscription 20% £180.00

By understanding these fundamental aspects of VAT, expats running businesses in the UK can ensure compliance with tax regulations and efficiently manage their financial responsibilities.

Double Taxation Agreements

Double Taxation Agreements (DTAs) play a crucial role for expats running businesses in the United Kingdom. These agreements are designed to prevent individuals and businesses from being taxed twice on the same income, a significant concern for those with international financial interests.

By establishing clear rules on how tax liabilities are distributed between countries, DTAs help facilitate international trade and investment while ensuring tax fairness and transparency.The primary benefit of DTAs is the alleviation of double taxation through tax relief measures such as exemptions, tax credits, or reduced tax rates.

These measures not only promote cross-border economic activities but also encourage expatriates to engage in international business without the burden of excessive taxation.

Countries with UK Double Taxation Agreements

The United Kingdom has established DTAs with numerous countries worldwide, aiming to protect its residents from the burden of double taxation on income and capital gains. These agreements are particularly beneficial for expats who earn income both in the UK and abroad.Some of the key countries with which the UK has DTAs include:

  • United States
  • Germany
  • France
  • Australia
  • Canada
  • China
  • India

These agreements provide a framework for clarifying tax liabilities and ensuring that income is only taxed once, either in the UK or the partner country.

Claiming Tax Relief under Double Taxation Agreements

To claim tax relief under a DTA, expats must follow specific procedures to ensure they benefit from the provisions of these agreements. The process typically involves demonstrating residency and income sources to the relevant tax authorities.One example of claiming tax relief is through the use of Form DT Individual, which allows UK residents to apply for relief at source from foreign taxes or to claim a tax refund.

This form requires detailed information about income types, amounts, and the applicable tax treaty provisions.For instance, if an expat is a UK resident earning dividends from the United States, they can apply for a reduced withholding tax rate under the UK-US DTA.

By submitting the appropriate documentation, they can reduce the withholding tax on dividends from the standard rate to the treaty rate, thereby minimizing their tax liability.

“The existence of DTAs ensures that expats can focus on growing their business ventures without the deterrent of being taxed twice on their income.”

Understanding and leveraging DTAs effectively can result in significant tax savings, making it essential for expats to be aware of these agreements and how to utilize them to their advantage.

Allowable Deductions and Expenses

Understanding allowable deductions and expenses is crucial for expats running a business in the UK. These deductions can significantly reduce the taxable income of a business, ensuring compliance while optimizing tax liabilities. Proper documentation and accurate claims are vital to take full advantage of these deductions.The UK tax system provides a framework for businesses to claim deductions on certain expenses directly related to their operations.

These expenses must be “wholly and exclusively” incurred for business purposes. Knowing what expenses qualify and how to document them can help in effectively managing business finances and ensuring compliance with HMRC regulations.

Types of Expenses That Can Be Claimed as Deductions

Businesses in the UK can claim a variety of expenses as deductions, provided they meet the criteria set by HMRC. Below is a list of common business expenses that are typically allowable:

  • Office Supplies: Includes stationery, printer ink, and other consumables needed for day-to-day operations.
  • Travel Expenses: Covers costs such as public transport, mileage, and accommodation incurred during business trips.
  • Staff Salaries and Wages: Payments to employees, including National Insurance contributions and pension contributions.
  • Professional Fees: Costs related to hiring accountants, consultants, or legal advisors.
  • Utility Bills: Expenses for water, gas, electricity, and internet services used for business operations.
  • Advertising and Marketing: Costs associated with promoting the business, including online advertising and print media.
  • Rent or Lease Payments: Payments for renting office space or business premises.
  • Insurance: Premiums for business-related insurance policies, such as public liability or professional indemnity insurance.
  • Training and Development: Costs related to improving staff skills and professional development.
  • Maintenance and Repairs: Expenses for repairs and maintenance of business equipment or premises.

Process for Documenting and Claiming Deductions

Accurate documentation is essential for claiming business expenses effectively. It ensures that claims are legitimate and substantiated in case of an audit by HMRC. Businesses should maintain a systematic approach to recording and filing expenses.First, keep detailed records of all transactions, including receipts and invoices.

It’s important to note the purpose of each expense and ensure it meets the “wholly and exclusively” criteria for business use. Electronic records are acceptable and can often simplify the process.Businesses must also categorize expenses appropriately, reflecting their nature and purpose.

This categorization aids in accurate reporting and simplifies during tax filing. It’s advisable to use accounting software to track expenses efficiently and generate necessary reports.When filing taxes, these documented expenses are reported in the Self-Assessment tax return. It is essential to ensure all claims are consistent with HMRC guidelines to avoid penalties or disallowance of certain deductions.

Remember, meticulous record-keeping and understanding of allowable expenses can optimize tax relief and ensure compliance with UK tax laws.

Tax Planning Strategies

Effective tax planning is essential for expat business owners operating in the United Kingdom to optimize their tax liabilities and ensure compliance with tax laws. By utilizing strategic financial practices, expats can minimize their tax burden while making the most of available tax benefits.A cornerstone of successful tax planning is maintaining accurate financial records.

This practice not only streamlines the tax filing process but also helps in identifying potential deductions and credits. An efficient record-keeping system enables business owners to track expenses, revenues, and other financial transactions that are crucial for tax planning.

Keeping Accurate Financial Records

Accurate financial records are indispensable for tax planning and compliance. They provide the basis for identifying allowable deductions and preparing accurate tax returns. An effective record-keeping system ensures that all financial transactions are documented, making it easier to spot errors and omissions.

  • Organize Receipts and Invoices: Establish a system to categorize and file all receipts and invoices related to business expenses. This will aid in easy retrieval during tax filing.
  • Use Accounting Software: Implement accounting software to automate the tracking of income and expenses. This reduces human error and provides real-time insights into the financial health of the business.
  • Hire a Professional Accountant: Engaging a qualified accountant can help in maintaining accurate records, ensuring compliance, and identifying potential tax-saving opportunities.

Sample Tax Planning Calendar with Key Dates

A tax planning calendar is an essential tool for expat business owners, outlining important tax-related dates and deadlines throughout the year. By adhering to this calendar, businesses can avoid late filing penalties and ensure timely compliance.

  1. January 31: Deadline for online self-assessment tax returns and payment of any tax due for the previous tax year.
  2. April 5: End of the UK tax year. It’s crucial to assess your financial position and ensure all records are up to date.
  3. July 31: Deadline for the second payment on account for the current tax year.
  4. October 5: Register for self-assessment if you have started a new business or need to report a new source of income.
  5. October 31: Deadline for paper self-assessment tax returns if you choose not to file online.

“Failing to plan is planning to fail.”

Alan Lakein

Staying informed about these key dates and maintaining a proactive approach to tax planning can significantly impact the financial success of an expat business. By leveraging these strategies, business owners can effectively manage their tax obligations while maximizing their financial potential.

Hiring and Employment Taxes

When running a business in the United Kingdom as an expat entrepreneur, hiring employees comes with various responsibilities, especially concerning employment taxes. It is crucial to understand these obligations to ensure legal compliance and efficient financial management. This section will provide a comprehensive review of the key responsibilities and procedures involved, equipping you with the necessary knowledge to manage employee-related taxes effectively.

Setting Up PAYE (Pay As You Earn)

PAYE is the system through which employers deduct tax and National Insurance contributions from an employee’s salary or wages before they are paid. Registering for PAYE is mandatory for all employers in the UK, and it must be set up before the first payday.

  • Register with HM Revenue and Customs (HMRC) as an employer to obtain a PAYE reference number.
  • Set up payroll processes, which can be handled manually, or through payroll software, ensuring accurate calculation of tax and National Insurance contributions.
  • Submit Real Time Information (RTI) to HMRC, reporting employees’ pay and deductions each time you pay them.
  • Provide employees with a payslip detailing their gross pay, deductions, and net pay.

Computing Employee Taxes

Understanding how to calculate employee taxes is fundamental to ensuring compliance with PAYE obligations. Here, we provide an example using an HTML table to illustrate how employee taxes might be computed.

Employee Name Salary (£) Tax Deducted (£) Net Pay (£)
John Smith 30,000 6,500 23,500
Jane Doe 45,000 9,500 35,500
Emily Green 55,000 12,000 43,000

This table demonstrates the calculation of employee taxes based on a basic PAYE model. The tax deducted is an estimation and can vary based on factors like personal allowances and tax codes, which are determined by HMRC guidelines. It serves as a basic framework to understand how salaries are adjusted for tax and National Insurance contributions, resulting in the net pay your employees receive.

Accurate tax calculations and records are essential for compliance and avoiding penalties. Utilizing payroll software can greatly assist in managing these responsibilities efficiently.

Reporting Foreign Income

In the globalized business environment, expatriates running businesses in the United Kingdom often have income sources from multiple countries. Understanding the implications of reporting foreign income is crucial for expat business owners to ensure compliance with UK tax regulations and avoid potential penalties.The UK’s tax system requires individuals and businesses to declare any foreign income as part of their tax returns.

This ensures that all income, regardless of its origin, is taxed appropriately. Failing to report foreign income can lead to severe consequences, including fines and other legal repercussions. Therefore, it’s essential for expat business owners to be well-versed in the process of declaring foreign income.

Step-by-Step Guide for Declaring Foreign Income on UK Tax Returns

Declaring foreign income can be a complex process, but breaking it down into manageable steps can make it more straightforward.

  • Gather Documents: Start by organizing all relevant documents related to foreign income. This includes bank statements, payslips, and any other financial records that detail income earned abroad.
  • Understand Foreign Tax Relief: If you’ve already paid tax on your foreign income in another country, you might be eligible for Foreign Tax Credit Relief or Double Taxation Relief, which can prevent you from being taxed twice.
  • Use the Self-Assessment System: Log into the HMRC Self-Assessment system and navigate to the relevant sections for foreign income. Depending on your situation, you may need to fill out additional forms, such as SA106, which is specifically for foreign income.

  • Convert Foreign Currency: Convert all foreign income into British Pounds (GBP) using the exchange rate applicable at the time the income was earned. HMRC provides guidelines on which rates to use.
  • Complete and Submit: Once all foreign income is accurately entered, review your tax return for any errors or omissions before submitting it by the deadline.

Common Challenges and How to Address Them

Expat business owners may face several challenges when reporting foreign income, but understanding these challenges and their solutions can ensure a smoother reporting process.

  • Differing Tax Years: Many countries have different fiscal years, which can complicate the reporting process. To address this, carefully align foreign income with the UK tax year and consult a tax professional if needed.
  • Complex Tax Treaties: Navigating tax treaties between the UK and other countries can be complex. Utilize resources available from HMRC and consider hiring a tax advisor who specializes in international tax law.
  • Exchange Rate Fluctuations: Fluctuations in exchange rates can impact the amount of tax payable. Regularly check HMRC guidelines on exchange rates to ensure accurate reporting.
  • Incomplete Records: Maintaining comprehensive and organized records is essential. Develop a consistent filing system for all documents related to foreign income and regularly update it.

Accurate reporting and thorough understanding of foreign income tax obligations can prevent costly mistakes and ensure compliance with UK tax regulations.

Legal Obligations and Compliance

Running a business as an expatriate in the United Kingdom involves navigating a complex legal landscape. As a business owner, understanding your legal obligations is crucial to ensure compliance and avoid penalties. The UK has specific requirements for expat entrepreneurs, and staying informed about these can help prevent legal issues.Expat business owners must adhere to several legal obligations.

These include registering the business, maintaining proper accounting records, and ensuring timely submission of tax returns and payments. Failure to comply with these obligations can result in penalties, fines, or even legal action, making compliance vital for smooth business operations.

Consequences of Non-Compliance with Tax Laws

Non-compliance with tax laws can have significant repercussions. It is essential for expat business owners to understand the potential consequences to mitigate risks effectively.Non-compliance may lead to:

  • Financial Penalties:The UK government imposes fines for late submissions or incorrect tax filings. These penalties can be substantial, affecting cash flow and profitability.
  • Legal Action:Persistent non-compliance can result in legal proceedings, which may include court action and even the dissolution of the business.
  • Reputational Damage:Businesses found to be non-compliant may suffer damage to their reputation, impacting relationships with customers, suppliers, and partners.

Practical Tips on Maintaining Compliance and Avoiding Legal Issues

To ensure compliance and avoid potential legal issues, expat business owners can adopt several practical strategies. These proactive measures can safeguard your business operations in the UK.Implement the following tips:

  • Stay Informed:Regularly update yourself on UK tax regulations and legal requirements. Engage with professional advisors or subscribe to industry newsletters to keep abreast of any changes.
  • Maintain Accurate Records:Ensure all business transactions are recorded accurately and systematically. Use accounting software to streamline this process and facilitate easy tracking of financial activities.
  • Meet Deadlines:Set reminders for filing deadlines and payment dates to avoid late submissions. Consider using digital tools or hiring a tax consultant to manage these tasks.
  • Conduct Regular Audits:Periodically review your financial records and tax filings to ensure accuracy. This can help identify potential issues early and rectify them before they escalate.
  • Seek Professional Help:Engage with legal and financial professionals who specialize in tax laws for expatriates. Their expertise can provide valuable insights and guidance in maintaining compliance.

Understanding and adhering to legal obligations in the UK is essential for expat business owners. By staying informed and implementing robust compliance strategies, you can navigate the UK’s legal landscape confidently and avoid potential pitfalls.

Epilogue

As you wrap up this tax journey, it’s clear that managing taxes as an expat business owner in the UK requires a blend of knowledge, strategy, and a touch of patience. By understanding your tax residency status, mastering the self-assessment process, and leveraging deductions, you can navigate the tax landscape with confidence.

Remember, compliance isn’t just about avoiding penalties; it’s about harnessing opportunities to make the most of your business endeavors. So, keep those records tidy, plan ahead, and let the UK tax system work for you, not against you.

Essential FAQs

What is the difference between tax residency and domicile?

Tax residency is about your obligation to pay taxes in the UK, based on factors like time spent in the country. Domicile, however, relates to your permanent home and affects certain tax liabilities, especially inheritance tax.

How can expats avoid double taxation?

Expats can avoid double taxation by utilizing the UK’s double taxation agreements, which allow you to offset tax paid in one country against the tax liability in another, ensuring you’re not taxed twice on the same income.

What are the penalties for late tax filings in the UK?

Penalties vary based on how late your submission is. It starts with a £100 fine if you miss the deadline and increases over time. Interest on unpaid taxes can also accumulate, adding to the penalty.

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