Can HMRC ask for documents more than six years old

Q: When might HMRC legitimately want older documents?

CH22140 gives three situations: A later period depends on it. Checking a chargeable gain may require the purchase agreement for the asset to verify the cost, however long ago it was bought. A suspected deliberate error. Where there are reasonable grounds to suspect a deliberate error, the assessment time limit can extend to 20 years. An international request. Another tax authority with a longer assessing time limit may ask HMRC for older information under an exchange of information agreement. These requests are handled by a specialist team. Record keeping rules point the same way. GOV.UK tells the self employed to keep records for at least five years after the 31 January submission deadline, and companies to keep records for six years from the end of the last financial year they relate to, or longer where, for example, an asset is expected to last more than six years or a transaction spans more than one accounting period. A business that still holds old records because of a long lived asset may be asked for them.

Q: How might this work in practice?

Illustration only. In October 2026 HMRC checks a capital gain on a commercial unit sold in 2024 and bought in 2012. A notice asks for the 2012 purchase contract and completion statement. Both documents wholly originate more than six years before the notice, so it must be given by or with an authorised officer's agreement. The notice confirms that agreement. The documents are reasonably required to check the base cost, so the owner provides them. If the notice had been issued without that agreement, the owner could have declined to produce the 2012 documents without failing to comply, although HMRC could then reissue it properly.

Yes, but only with extra authority. Paragraph 20 of Schedule 36 to Finance Act 2008 says an information notice may not require a person to produce a document if the whole of it originates more than six years before the date of the notice, unless the notice is given by, or with the agreement of, an authorised officer. A document with any part created within the six years is not caught, and the restriction concerns producing documents rather than providing information.

Tax investigation insurance from £108.75 a year (£9.06 a month).Pays up to £100,000 of your accountant's fees if HMRC opens an enquiry. No excess. Buy online in a few minutes.

See my price in 2 questions How the cover works Accountant? Offer cover to your clients or call 01795 841 310

What exactly does paragraph 20 restrict?

The full text is short: “An information notice may not require a person to produce a document if the whole of the document originates more than 6 years before the date of the notice, unless the notice is given by, or with the agreement of, an authorised officer.” Each element has a job:

The whole of the document: If any part of the document originates within the six years, the restriction does not apply. HMRC’s guidance at CH22140 gives the example of a cash book whose first entry is eight years old and last entry three years old: it can be required without an authorised officer. A cash book believed to be entirely seven years old needs one.
Originates: CH22140 speaks of a document “entirely created” more than six years ago. The date that counts is when the document came into being, not the period it describes.
The date of the notice: The six years runs back from the date of the notice, not from the start of the enquiry or the year under check.
Produce: The paragraph refers only to producing a document. It does not stop a notice requiring a person to provide information, although every requirement must still be reasonably required, as explained in the reasonably required test.

Why does HMRC rarely need old documents?

CH22140 says a document entirely created more than six years ago would normally only affect a tax position that can no longer be changed because the assessment time limit has expired. For income tax and capital gains tax the ordinary limit is four years after the end of the tax year (section 34 of the Taxes Management Act 1970), extended to six years where a loss of tax was brought about carelessly and 20 years where it was brought about deliberately (section 36). CH21620 also tells officers that a tax position can only be corrected within the relevant time limits. The six year rule in paragraph 20 is a procedural safeguard that matches this: older material needs a senior officer to look at why it is wanted. For the time limits in more detail, see how far back can HMRC go.

Worried about an HMRC check? Tax investigation insurance pays your accountant’s fees if HMRC opens an enquiry or compliance check. Solar Protect cover pays up to £100,000 with no excess. It never pays tax, interest or penalties.

From £108.75 a year (£9.06 a month) for individuals, £117.57 for sole traders and £207.50 for companies and partnerships, including IPT and the £20 admin fee.

See my price in 2 questions or call 01795 841 310.

★★★★★ Rated 4.9 out of 5 on Trustpilot from over 160 reviews

When might HMRC legitimately want older documents?

CH22140 gives three situations:

A later period depends on it. Checking a chargeable gain may require the purchase agreement for the asset to verify the cost, however long ago it was bought.
A suspected deliberate error. Where there are reasonable grounds to suspect a deliberate error, the assessment time limit can extend to 20 years.
An international request. Another tax authority with a longer assessing time limit may ask HMRC for older information under an exchange of information agreement. These requests are handled by a specialist team.

Record keeping rules point the same way. GOV.UK tells the self employed to keep records for at least five years after the 31 January submission deadline, and companies to keep records for six years from the end of the last financial year they relate to, or longer where, for example, an asset is expected to last more than six years or a transaction spans more than one accounting period. A business that still holds old records because of a long lived asset may be asked for them.

Who is an authorised officer and what must they check?

Paragraph 59 defines an authorised officer as an officer authorised by the Commissioners, individually or as one of a class, for the purpose of the relevant provision. HMRC’s guidance at CH21720 says an authorised officer must agree any notice requiring documents originating more than six years ago, and describes what is expected of them. They should have practical experience of the information powers, must “stand back and reach a fresh view”, must be satisfied the notice is appropriate and proportionate to the risks identified, and must be satisfied that any representations from the taxpayer or the recipient have been considered. If a notice asks for old documents, it is reasonable to ask HMRC to confirm that an authorised officer agreed it.

What if HMRC thought the documents were more recent?

CH22140 says the officer’s belief “is a good guide, but it is not the final test”. Documents that are in fact more than six years old need a notice issued with an authorised officer’s agreement, even if the officer genuinely thought they were newer. The guidance then says that a person will not have failed to comply with a notice if it was issued without an authorised officer’s agreement and they do not produce a document that is more than six years old. In that situation there is no failure to comply for a paragraph 39 penalty to attach to.

Are there cases where the limit is longer?

Yes. Paragraph 34B(4A) provides that, for a third party notice or an identity unknown notice that relates only to certain pension issues, paragraph 20 has effect as if the reference to six years were to ten years. CH22140 explains that this covers notices about qualifying recognised overseas pension schemes and former such schemes. Otherwise the six year figure applies across all Schedule 36 notices, including third party information notices.

How do you challenge a request for old documents?

If the notice is appealable, appeal in writing to the officer within 30 days of the date it was given, stating your grounds (paragraph 32); the tribunal can confirm, vary or set aside the requirement. Possible grounds include that the documents wholly originate outside the six years and no authorised officer agreed the notice, or that they are not reasonably required because every relevant year is out of time. There is no appeal against a requirement for statutory records (paragraph 29(2)), but paragraph 62(3) provides that records stop being statutory records once the period for which they must be preserved has expired. Where no appeal is available, CH21700 indicates that disputes about statutory records can be raised on an appeal against any penalty or by judicial review. See appealing an HMRC information notice.

How might this work in practice?

Illustration only. In October 2026 HMRC checks a capital gain on a commercial unit sold in 2024 and bought in 2012. A notice asks for the 2012 purchase contract and completion statement. Both documents wholly originate more than six years before the notice, so it must be given by or with an authorised officer’s agreement. The notice confirms that agreement. The documents are reasonably required to check the base cost, so the owner provides them. If the notice had been issued without that agreement, the owner could have declined to produce the 2012 documents without failing to comply, although HMRC could then reissue it properly.

What mistakes come up?

Assuming anything dated before the six years is protected. A ledger or file with recent entries is a single document and is not caught.
Assuming the restriction stops questions. HMRC can still require information about older events if it is reasonably required.
Destroying old records once a notice or a warning has been received. Paragraphs 42 and 43 prohibit concealing or destroying documents covered by a notice or that HMRC has said it is likely to request.
Ignoring the authorised officer point. If a notice for wholly old documents does not show that agreement, ask.

If HMRC opens a check into your return, tax investigation insurance pays your accountant’s fees. Solar Protect cover pays up to £100,000 with no excess; it never pays tax, interest or penalties. Read how our cover works or get a quote.

Related Accountapedia entries

Sources

Reviewed by Christine Anderson, Broker, Solar Protect. Last reviewed 24 October 2026. Part of Accountapedia, the Solar Protect guide to UK tax and accounting. This page is general information, not personalised advice.