Six years — for both income tax and VAT. That is the retention period the Isle of Man Income Tax Division and Isle of Man Customs & Excise work to, and it applies whether you are a sole trader, a partnership or a company. It is not a filing suggestion. If the Assessor of Income Tax queries a figure, the records are what settle it, and a business that cannot produce them is arguing from memory against an assessment. The obligation is one of the least glamorous things a Manx business carries and one of the cheapest to get right.
What the six years covers
For income tax, it means the records behind your return: sales and income records, purchases and expenses, bank statements, invoices, receipts, payroll records if you have employees, and anything supporting a claim you made.
For VAT, if you are registered, it means the trail Customs & Excise expects: sales invoices and receipts, purchase invoices, credit notes, import and export documentation, and the workings behind adjustments — bad debt relief, partial exemption, and anything else that moved a figure on a return.
| Record type | Keep for |
|---|---|
| Income tax records (all business types) | 6 years |
| VAT records, if registered | 6 years |
| Payroll records (T14s, deductions) | 6 years |
| Company statutory records | For the life of the company |
The last row is the one people miss. Your register of members, register of directors and the corporate paperwork behind them are not tax records with a six-year clock — they are the company's own records and belong with it for as long as it exists. Losing them creates problems in any transaction where someone needs to see the ownership history.
Digital counts
Records do not have to be paper. Cloud accounting, scanned invoices and bank feeds are all acceptable records provided they are complete, legible and retrievable for the whole period.
The practical risks with digital are different from the paper ones, and they are worth naming, because they are how businesses lose records without noticing:
- The subscription lapses. If your accounting software is the only place your records exist, cancelling it can put six years of history behind a paywall or delete it. Export before you cancel.
- Nobody has the login. Records held in one person's personal account are not the business's records in any practical sense.
- Receipts fade. Thermal till receipts are often unreadable within two years. Photograph them at the time.
- The bank only goes back so far. Many business accounts do not give you statements from six years ago on demand. Download them annually rather than assuming they will be there.
Our guide to cloud accounting for Isle of Man businesses covers how to set this up so retention takes care of itself.
Why it matters more than it sounds
Three reasons, in ascending order of expense.
Supporting your return. The everyday case. A query about a figure is a five-minute conversation if the invoice is to hand, and a much longer one if it is not.
Default assessments. Where a return has not been filed, the Assessor can raise a default assessment — an estimate made without your figures. Displacing one means producing the real figures, and the real figures come from the records (PwC Isle of Man).
Due diligence. Selling the business, taking on an investor, refinancing, or simply satisfying a bank's periodic review all involve someone else reading your history. Six years of complete records is a routine review. Gaps are a discount, a delay, or both.
What to keep for longer than six years
Six years is the floor, not a deletion deadline. Some things are worth keeping indefinitely because they are not really about a single tax year:
- Anything relating to an asset you still own. Purchase documents, improvement costs and title records for property or equipment stay relevant for as long as you hold the asset. The Island has no Capital Gains Tax, but that does not make the acquisition history useless — lenders, buyers and insurers all ask for it.
- Contracts still in force. A ten-year lease is a live document in year eight.
- Anything connected to a dispute. Open matters do not respect retention schedules.
- Company statutory books. As above — the life of the company.
Conversely, once the six years is genuinely up and nothing above applies, there is no virtue in hoarding. Records containing personal data should not be kept beyond the period there is a reason to keep them.
A retention routine that actually holds
The businesses that get this right are not the ones with the best filing cabinets. They are the ones that do the same small thing every year:
- At each year end, export everything from the accounting system to a dated archive — a folder, a drive, somewhere outside the software.
- Download all twelve months of bank statements in the same sitting.
- Keep payroll records for the year with them, not in a separate system.
- Label the archive by tax year, not by calendar year, so it matches the return it supports.
- Store a copy somewhere the business controls, not an individual.
That is roughly an hour a year. It replaces the alternative, which is reconstructing 2021 in the middle of a query in 2027.
If your bookkeeping is already handled monthly rather than in an annual scramble, most of this is already happening — see our guide to what management accounts are and how a monthly rhythm changes what year end feels like.
If you are VAT registered
The VAT trail is the one most often incomplete, because it depends on documents from other people. Registration is required once taxable turnover exceeds £90,000, and Manx VAT is administered by Isle of Man Customs & Excise — not HMRC — with registration on Form VAT1MAN. Most businesses file quarterly.
The records that go missing are almost always purchase invoices from small suppliers and the workings behind an adjustment. Both are easy to capture at the time and hard to recreate later. Our guide to VAT in the Isle of Man covers the rates and the registration position.
Where most businesses actually lose the trail
Not in year six — in year one. The records that go missing are the ones nobody filed at the time: the receipt paid from a personal card, the invoice that only ever existed in an email, the adjustment someone worked out on paper. By the time a query arrives, the person who knew what it was has left or forgotten.
Retention is really a bookkeeping question wearing a compliance hat. A business whose books are done monthly has its six years almost automatically. A business that reconstructs the year each spring is one lost laptop away from a gap it cannot fill.
Frequently asked questions
How long must Isle of Man businesses keep records? Six years, for both income tax and VAT records. This applies to sole traders, partnerships and companies.
Do digital records count on the Isle of Man? Yes, provided they are complete, legible and retrievable throughout the retention period. Export from accounting software to an archive you control rather than relying on a live subscription.
How long should I keep VAT records? Six years. That includes sales and purchase invoices, credit notes, import and export documents, and the workings behind adjustments such as bad debt relief and partial exemption.
What happens if I cannot produce my records? You are in a weak position if a figure is queried, and where no return has been filed the Assessor of Income Tax can raise a default assessment based on an estimate rather than your actual figures.
Are company statutory records also six years? No. Registers of members and directors and the company's corporate paperwork belong with the company for its whole life, not for a six-year tax period.
Who administers VAT on the Isle of Man? Isle of Man Customs & Excise, not HMRC. Registration is required once taxable turnover exceeds £90,000 and is made on Form VAT1MAN.
