How to Amend Companies House Accounts

If you already filed your accounts with Companies House through TinyTax and need to correct them, you can submit amended accounts. This guide walks you through the process.

[ui:alert:warning:Applies only when the <strong>original accounts were submitted through TinyTax</strong>. For any other origin, see [Amending a CT600 or Accounts Filed Elsewhere.]]

When You Need to Amend

You should amend your Companies House accounts if:

• You made a mistake in your original filing (wrong figures, missing items)
• You need to add balance sheet line items that were left out (e.g., fixed assets, long-term creditors)
• Your P&L figures need correcting

How to Amend Your Accounts

Step 1: Start the Amendment

1. Go to your TinyTax dashboard
2. Find the filing period you want to amend
3. Click Actions ▾ next to that period
4. Select Amend Accounts

Step 2: Enter Your Reason and Summary

A modal will ask you two questions:

• What was wrong with the original accounts? — Explain what needs correcting (e.g., "Turnover was understated by £5,000"). This appears in the revised accounts as required by Companies House.
• Summary of changes being made — Briefly describe your corrections (e.g., "Corrected turnover from £45,000 to £50,000").

Step 3: Update Your Figures

The amendment opens the same full submission form as your original filing. All fields are available — you can:

• Change existing figures
• Add values to fields that were blank in the original (e.g., fixed assets, creditors falling due after more than one year)
• Import a trial balance or CSV if you prefer

Step 4: Review and Submit

1. Click Preview to review your amended accounts
2. You will see an Accounts Amendment banner confirming this is a revised filing
3. Your reason and summary will appear in the generated accounts document as a "Revised Accounts Statement"
4. Click Submit Accounts and enter your Companies House authentication code
5. Your amended accounts are filed with Companies House

What Happens After You Submit

• The amended accounts replace your original filing on the Companies House public record
• The original accounts remain visible with a note that they have been superseded
• Companies House reviews the amendment manually, so processing takes longer than a standard filing
• You will receive confirmation once the amended accounts are accepted

Common Questions

Why does the preview show a "Period mismatch" warning?

This warning is expected during an accounts amendment and does not prevent you from submitting. You can safely ignore it and proceed.

Here is why it appears: once you have filed accounts for a given period (e.g., year to 30 June 2025), Companies House records that your next expected accounts are for the following year (e.g., 30 June 2026). When you amend the already-filed period, TinyTax correctly shows your draft as being for the original period (30 June 2025), which differs from what CH expects "next" — triggering the mismatch notice. The amendment is going to the right place; the warning is simply an informational artefact of the amendment flow.

Can I add a note to my accounts to mark them as amended?

There is no free-text notes field in the TinyTax form. The accounts TinyTax generates are in the statutory micro-entity format (FRS 105); the notes sections follow the required structure and are not user-editable.

If you use the Amend Accounts flow (available for accounts originally filed through TinyTax), the reason and summary you enter are included automatically in the accounts as a "Revised Accounts Statement" in the notes to the financial statements. This is the standard way to formally mark accounts as amended under the Companies Act 2006.

If you are filing fresh accounts for a period where the original was filed elsewhere, there is no way to add custom wording through TinyTax. Those accounts will appear as a new filing rather than a formal amendment.

Can I amend accounts that were filed elsewhere?

The Amend Accounts option only appears for accounts originally filed through TinyTax. If your accounts were filed through another service, an accountant, or via the old Companies House WebFiling service, TinyTax cannot generate an amendment because it does not hold the original submission record.

Companies House WebFiling closed in March 2026. If you previously filed via WebFiling and now need to submit revised accounts, you will need to use iXBRL-capable software or instruct an accountant who can file on your behalf. Companies House no longer accepts accounts in any format other than iXBRL for electronic filing.

Do I need to amend my CT600 as well?

It depends on what changed. If your amendments affect figures that also appear on your CT600 (like turnover or profit), you should amend your CT600 separately. See our CT600 amendment guide.

Why does the "Amend Accounts" form not show losses carried forward or the tax section?

"Amend Accounts" covers Companies House accounts only — it does not include any corporation tax calculation. The losses carried forward field and the Tax Computation section belong to the CT600, which is filed separately with HMRC.

Your original CT600 — including any losses carried forward — is completely unaffected by an accounts amendment. Submitting amended accounts will not change your corporation tax in any way.

If you also need to update your CT600 (for example, because your profit figures changed), you would do that separately via Actions ▾ → Amend CT600. See our CT600 amendment guide.

Is there a fee for amending accounts?

TinyTax does not charge extra for amendments — they are included with your subscription. Companies House does not charge a fee for revised accounts either.

Can I amend more than once?

Yes. If your amended accounts are accepted and you later find another error, you can submit a further amendment from the dashboard.

Can I change from micro-entity (FRS 105) to full or small company (FRS 102) accounts in an amendment?

No — TinyTax determines the accounts format automatically based on your company's size thresholds, for both original filings and amendments. If your company qualifies as a micro-entity when you file the amendment, the amended accounts will still be in FRS 105 (micro-entity) format.

FRS 105 micro-entity accounts do not include a publicly visible profit and loss account at Companies House. If you specifically need the income statement to appear publicly — for example, because shareholders or lenders require it — you would need FRS 102 Section 1A (small company) accounts. TinyTax does not currently support voluntarily choosing FRS 102 for a company that qualifies as micro-entity.

See Choosing FRS 102 When Your Company Qualifies as Micro-Entity for options, including how the size thresholds work and how to handle the accounts element outside TinyTax if needed.

Still Have Questions?

If you need help with your amendment, get in touch — we are happy to help.