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OT Tax Code ยท UK HMRC

Tax Code OT: What It Means

๐Ÿ“… Last updated: June 2026 ยท FreelanceRateCalculator.com ยท For guidance only โ€” always verify with HMRC or a qualified accountant.

Tax code OT means HMRC has no information about your personal allowance and is taxing all your income โ€” at basic, higher or additional rate as applicable โ€” with no tax-free amount deducted. It is a temporary code that is usually corrected once HMRC has the right information.

The OT tax code means no personal allowance is being applied to that income source. Here is why HMRC uses it, when it appears and how to get it corrected.

What Is Tax Code OT?

The OT tax code means that no personal allowance is given against that particular income source. Every penny of income from that source is taxed starting from the 20% basic rate, without the benefit of the ยฃ12,570 annual allowance. It is applied by HMRC when they do not have enough information to issue a correct tax code โ€” typically to a new income stream or a new employer who does not yet have your full tax details.

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Why Is OT Applied?

  • !No P45 submitted โ€” starting a new job without providing a P45 from your previous employer
  • !Emergency measure โ€” HMRC applying a code before they have your full details
  • !Personal allowance already used โ€” if your personal allowance is already allocated to another income source
  • !Income over ยฃ125,140 โ€” at this level the personal allowance is eliminated, making OT technically correct

How to Fix an OT Tax Code

If OT has been applied incorrectly (i.e. you do have a personal allowance available and it is not being used elsewhere), contact HMRC on 0300 200 3300 or update your tax code through your Personal Tax Account online. For new employment income, submitting a P45 to your new employer usually resolves it quickly. Any tax overpaid due to OT being applied incorrectly can be reclaimed through Self Assessment or by contacting HMRC directly.

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Frequently Asked Questions

FAQ
What is tax code OT?+
OT means no personal allowance is being applied to that income. Every pound of that income is taxed from 0% upward without the usual ยฃ12,570 tax-free amount. HMRC usually applies it when they do not have enough information to issue a correct code.
Is OT tax code emergency rate?+
OT is sometimes described as an emergency tax code because HMRC uses it as a holding measure when they cannot issue a full code. However, it differs from the BR emergency code (which taxes everything at 20%) โ€” OT applies the correct progressive rates but without a personal allowance.