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A person working out their tax code with a calculator, pen and a form, seeing if they are using the 500T tax code.
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What is the 500T Tax Code?

A person working out their tax code with a calculator, pen and a form, seeing if they are using the 500T tax code.

Introduction

If you’ve noticed the 500T tax code on your payslip and felt a little confused, don’t worry – you’re not alone. In fact, Tax codes can look like a jumble of numbers and letters, but they actually play a big role in how much tax you pay.

At eAccounts, we’re all about making tax and finances easier to understand. So, in this blog, we’ll explain exactly what the 500T tax code means, why you might have it, what to do about it, and how it affects your pay. Let’s get started.

What Does the 500T Tax Code Mean?

The 500T tax code is a temporary and emergency tax code used by HMRC (HM Revenue and Customs) when they don’t have enough information to assign you a standard tax code. Let’s break it down:

  • 500: This means HMRC is giving you a temporary personal allowance of £5,000 (far lower than the usual tax-free allowance of £12,570).
  • T: This letter means your employer or HMRC needs to review your situation, especially if it involves things like benefits, other jobs, or pensions.

Unlike regular tax codes, the 500T code works on a non-cumulative basis – meaning your employer calculates tax on each payslip individually, without considering your past earnings or tax already paid this year.

Why Have I Been Given the 500T Tax Code?

HMRC might give you this code if they don’t know your full tax situation. It’s common in a few scenarios:

1. You’ve Started a New Job

If you didn’t provide a P45 from your previous employer, or if this is your first-ever job, your new employer might not have enough information to apply the correct code. In these cases, they’ll use a temporary code like 500T.

2. You Have Multiple Jobs

If you work more than one job or earn additional income (like from freelance work), HMRC might assign you the 500T code while they determine how much personal allowance you’re entitled to If that applies, you may also want to review our guide to managing self-assessment.

3. HMRC Needs More Info

Sometimes, it’s just that HMRC hasn’t yet received your employment details or you’ve recently changed tax years, moved jobs, or updated your work situation and they haven’t caught up.

4. You Missed a P60/P45

Not handing in key paperwork like your P60 or P45 can confuse your new employer’s payroll – leading them to assign you a temporary code like 500T just to be safe.

How the 500T Tax Code Affects Your Pay

You Might Be Paying Too Much Tax

Because the 500T code uses a lower personal allowance (£5,000 instead of £12,570), you’ll pay tax sooner on your income. That often causes you to overpay tax – at least until you sort out your situation.

Tax Is Non-Cumulative

Every payday, the system works out your tax without referring to how much you’ve earned or paid in tax so far this year. That can make it harder to plan ahead and can cause either underpayment or overpayment.

You Might Get a Refund Later

The good news? If you do end up overpaying tax while on the 500T code, you’ll get it back once HMRC updates your code and reviews your record.

What Should You Do If You’re on the 500T Tax Code?

Let’s look at some actionable steps you can take today to fix or manage the 500T code.

1. Gather Your Documents

Get your P45, P60, recent payslips, or any correspondence from HMRC together. This helps give them a full picture of your income.

2. Contact HMRC

Call HMRC on 0300 200 3300 or visit the HMRC contact page to report the issue, or you can use your online Personal Tax Account to report the issue. Make sure you mention that HMRC assigned you the 500T tax code and provide them with any missing details.

3. Set Up Your Personal Tax Account

If you haven’t already, set up your Personal Tax Account. It’s free and gives you access to your tax codes, earnings, and more. You can also check out our step-by-step guide on setting up a Personal Tax Account .

4. Talk to Your Employer’s Payroll Team

Let your employer know about the situation – they might be able to provide guidance or check if they’ve sent the correct info to HMRC.

5. Keep an Eye on Your Payslips

As soon as HMRC updates your tax code, you’ll see the new code on your next payslip. Double-check that the tax is correct and that the system isn’t over-taxing you anymore.

6. Claim a Refund if Needed

If the 500T code caused you to pay too much tax, you can usually get a refund either:

  • Automatically through your next pay (if it’s in the same tax year), or
  • By filling out a tax refund form on HMRC’s website (if the tax year has ended).

Understanding the “T” in 500T

The ‘T’ in 500T means HMRC is reviewing your tax situation and needs to perform further checks. They use it as a catch-all flag when they aren’t sure about:

  • Additional benefits or income
  • Your correct tax-free personal allowance
  • Pension contributions or state benefits

Once HMRC finishes reviewing your case, they’ll issue a new tax code and update your employer

FAQ: What is the 500T Tax Code?

Is the 500T tax code bad?

Not necessarily – it’s just temporary. But if left unaddressed, it could cause you to overpay tax. That’s why it’s important to act quickly and get it sorted.

How long will I stay on 500T?

You’ll stay on it until HMRC has all the information they need. This could be a few weeks or a couple of months, depending on how quickly the info is submitted and processed.

Can I fix the 500T tax code myself?

Yes! You can:

  • Log in to your Personal Tax Account
  • Provide missing employment details
  • Contact HMRC with your documents

Will I get a refund?

If you overpaid, yes. Refunds usually happen automatically once your code is corrected. If not, you can claim a refund online.

Can eAccounts help with tax codes?

Absolutely. At eAccounts, we help individuals and small businesses stay on top of tax changes. Whether you’re dealing with 500T, self-assessment, or payroll queries, we’re here to support you.

Final Thoughts

Being on the 500T tax code can be a bit of a pain – but it’s not permanent, and it’s not the end of the world. The key is to act quickly, stay organised, and communicate with HMRC and your employer.

If you’re feeling stuck or just want some help reviewing your tax situation, get in touch with us at eAccounts. We’re here to help you understand your tax code, reclaim overpaid taxes, and stay compliant without the stress.

Need Help With Your Tax Code?

Reach out to eAccounts today – we make tax simple. Whether you’re an employee, freelancer, or small business owner, we can help you make sense of your finances.

For more information, please get in touch today! Click one of the buttons below to either ‘Get a Quote’ for your business OR ‘Book a Meeting’ with one of our experts! 
 

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