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What is Tax Code OT?

Updated: 5 days ago

Introduction to Tax Codes in the UK

Tax codes are a crucial part of the UK's tax system, used by HM Revenue and Customs (HMRC) to determine how much income tax should be deducted from your salary or pension. Each tax code is made up of numbers and letters that represent personal allowances and special conditions that affect how much tax you need to pay. For many, understanding tax codes can be confusing, but it’s vital to ensure you're not overpaying or underpaying tax.


At Ultra Tax Ltd, we specialise in helping both individuals and businesses understand their tax codes and make sure they’re paying the correct amount of tax. In this guide, we’ll break down everything you need to know about Tax Code OT and how it could affect your financial situation.


What is Tax Code OT?

What Does Tax Code OT Mean?

Tax Code OT is an emergency tax code that is often assigned when HMRC doesn’t have enough information about your income. Unlike other tax codes, OT does not provide you with any personal allowance. This means your entire income is taxed without accounting for the usual tax-free portion (currently £12,570 for most people). As a result, you may pay more tax than you need to.


At Ultra Tax Ltd, we often see clients struggle with OT codes and end up overpaying tax. Our team can help you resolve any issues and ensure you’re assigned the correct tax code.


Why You Might Be Assigned Tax Code OT

There are several reasons you might find yourself with Tax Code OT, including:


  • Starting a new job and not providing your P45 to your employer

  • Having multiple jobs or sources of income without proper tax documentation

  • Receiving redundancy payments

  • Pension withdrawals


In these situations, your employer might not have enough information to apply the correct tax code, so they assign OT temporarily. Unfortunately, this often leads to higher tax deductions until the issue is resolved.


How Tax Code OT Affects Your Income

Because Tax Code OT doesn’t include any personal allowance, all of your earnings are taxed from the first penny you make. This can lead to significant deductions in your take-home pay.


For example, if you earn £25,000 annually and are on Tax Code OT, your tax could be calculated as if you have no personal allowance, meaning you might end up paying hundreds or even thousands of pounds more in tax.


Ultra Tax Ltd can help by reviewing your tax code and identifying whether you’re being overtaxed. If you are, we’ll work with HMRC on your behalf to correct the code and


How to Correct Tax Code OT

If you’ve been assigned Tax Code OT, don’t worry—it’s usually a temporary situation. The first step is to check your payslip for your current tax code. If you see OT, it’s important to take immediate action. Here’s how you can correct it:


  1. Contact your employer to ensure they have all the necessary tax documents, such as your P45 or P60.

  2. Get in touch with HMRC to clarify your tax situation and request a tax code update.

  3. If you’ve been assigned the wrong tax code, Ultra Tax Ltd can help by liaising directly with HMRC to fix the error and reclaim any overpaid tax.


Common Scenarios Leading to OT Tax Code

Tax Code OT is most often assigned when there’s a lack of information about your income. Common scenarios include:


  • Starting a new job and not providing your employer with a P45.

  • Moving from self-employment to employment, or vice versa.

  • Receiving pension lump sums or redundancy payments.

  • Working multiple jobs where tax codes have not been correctly assigned.


These scenarios can easily cause confusion, leading to tax errors. Ultra Tax Ltd has extensive experience in resolving these types of tax code issues. We can review your situation and ensure you’re assigned the right tax code.


Emergency Tax Codes Explained

An emergency tax code is a temporary tax code assigned when HMRC or your employer does not have enough information to calculate your tax correctly. Tax Code OT is one such emergency code. Other common emergency tax codes include 1257L, which is based on the standard personal allowance, but may still not fully reflect your financial situation.


If you find yourself on an emergency tax code, it’s important to act quickly. At Ultra Tax Ltd, we can help you review your payslip and correct any tax code issues, ensuring that you only pay what’s necessary.


How to Avoid Being Assigned OT in the Future

To avoid being assigned Tax Code OT, it’s essential to keep your tax records up to date. Here are some tips to prevent future tax issues:


  • Always provide your new employer with your P45 from your previous job.

  • Make sure to submit your P60 at the end of each tax year to confirm how much tax you’ve paid.

  • Inform HMRC of any changes in your employment status, especially if you have multiple sources of income.


At Ultra Tax Ltd, we help our clients stay on top of their tax obligations, ensuring their tax codes remain accurate and up to date. By working with us, you can avoid the stress of emergency tax codes like OT.


The Financial Impact of OT Tax Code

Tax Code OT can have a substantial impact on your finances, especially if it’s left unresolved for an extended period. Since OT does not take into account any personal allowance, you could be paying a significantly higher percentage of tax than you should.


Whether you’re a low earner or a high earner, the financial hit from Tax Code OT can be difficult to manage. Ultra Tax Ltd can help you correct the code, adjust your budget, and even claim back any overpaid taxes.


How to Claim Back Overpaid Tax Due to OT Code

If you’ve paid too much tax due to being on Tax Code OT, you’re entitled to claim a refund. The process is straightforward but requires accurate documentation. Here’s what you need to do:


  1. Submit a claim to HMRC, either online or by phone.

  2. Provide proof of your earnings and the tax you’ve paid.

  3. HMRC will review your case and issue a refund if applicable.


Ultra Tax Ltd can handle the entire process on your behalf, making sure you receive any overpaid tax promptly.


Tax Code OT for Employers: What They Need to Know

If you’re an employer, assigning the correct tax code to your employees is crucial. Failing to do so can result in over or under-taxation, causing issues for both you and your employees. To avoid mistakes like assigning OT unnecessarily, always ensure you have the proper tax documents from new hires and communicate with HMRC regularly.


At Ultra Tax Ltd, we offer payroll services to ensure your employees are taxed correctly, preventing costly errors.


When OT Is the Correct Tax Code

In some instances, Tax Code OT might be correct, such as when you’ve withdrawn a lump sum from your pension or received a large redundancy payment. In these cases, the OT code ensures the correct amount of tax is deducted upfront.


Even in situations where OT is appropriate, you may still be entitled to a refund at the end of the tax year. Ultra Tax Ltd can help you navigate these complex scenarios and ensure you’re taxed fairly.


Can Tax Code OT Affect Your Benefits?

Your tax code can also affect your eligibility for state benefits, as it impacts your overall income and National Insurance contributions. If you’re on Tax Code OT, your benefits might be incorrectly calculated.


Ultra Tax Ltd can help ensure your tax code is accurate so that your benefits are not affected by unnecessary deductions.


Conclusion: What to Do if You’re Assigned Tax Code OT

If you’ve been assigned Tax Code OT, it’s important to act quickly to avoid overpaying tax. Contacting HMRC and ensuring that your employer has the correct tax documents is the first step in resolving the issue. Additionally, working with a professional accountancy firm like Ultra Tax Ltd can help speed up the process and ensure you’re on the correct tax code.


At Ultra Tax Ltd, we provide expert guidance on tax code issues, helping you save money and avoid unnecessary tax complications. Get in touch with us today, and let’s resolve your tax code OT problems for good!






Frequently Asked Questions (FAQs)


1. What is an OT tax code refund?

An OT tax code refund is when you receive money back from HMRC after overpaying taxes due to being placed on Tax Code OT.


2. How long will I be on Tax Code OT?

Tax Code OT is usually temporary and can be resolved once you provide HMRC or your employer with the correct information.


3. Is Tax Code OT permanent?

No, OT is not permanent. It’s used as an emergency tax code until your tax situation is clarified.


4. Can I fix my tax code myself?

Yes, you can contact HMRC to update your tax code, but it’s often easier to work with an accountant like Ultra Tax Ltd, who can handle the process for you.


5. Will I always pay more tax with OT?

Yes, because OT doesn’t account for any personal allowance, meaning you’re likely paying more tax than necessary.



Ultra Tax Ltd

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