Most people only think about tax documents in June, when the return is due and the papers are somewhere in a drawer, a bag or a phone. Collecting them then costs time and sometimes money, because a missing receipt can mean a deduction you cannot prove. A small system kept up all year takes a few minutes a month and removes the stress.

Decide what you need to keep

The exact list depends on how you earn, but most people need some of these:

  • payslips and the P9 form from each employer;
  • your KRA PIN certificate and iTax payment receipts;
  • bank and M-Pesa statements that show income and business spending;
  • invoices, receipts and eTIMS documents for business expenses;
  • insurance, pension and mortgage statements that support reliefs;
  • rental agreements and rent receipts if you are a landlord;
  • tax compliance certificates and any letters from KRA.

For the reasons behind this, read how to keep business records for KRA and records every landlord should keep.

Build a folder structure once

Make one main folder for each tax year, such as 2026, and put the same sub-folders in each: income, expenses, reliefs, tax payments and correspondence. Do it on your computer or phone and back it up to a second place. A paper folder works too, with a divider for each section. The point is that every document has an obvious home.

Name files so you can find them

A name such as "2026-10-12 fuel receipt 4,200" tells you what a file is without opening it. Start with the date in year-month-day order so the files sort themselves. Photograph paper receipts straight away, because thermal paper fades within months, and keep the original if the amount is large.

Set a monthly ten-minute routine

Pick a fixed day, such as the first Saturday of the month. On that day:

  1. file the month's receipts, payslip and statements in their folders;
  2. note any tax payment you made and keep the receipt;
  3. check that nothing is missing, such as a payslip you did not receive.

The tax records checklist and document log gives you a ready list to tick off, and it records where each document is kept.

Keep supporting records for reliefs

Reliefs reduce your tax only if you can prove them. Insurance premiums, pension contributions and mortgage interest each need a statement from the provider. See personal relief and tax reliefs explained and how to claim insurance relief on PAYE for what to ask for, and use the tax reliefs calculator to see the effect.

Match your records to your return

When you file, work from your folder rather than from memory. If you are an employee, your P9 gives most of the numbers; the P9 tax return calculator shows how they fit together, and filing your employment return with a P9 explains the steps. Check your iTax ledger as well; how to read your iTax ledger helps you spot payments that were not credited.

How long to keep them

Keep tax records for at least five years, and longer where a matter is under dispute. Do not throw documents away just because the return was accepted. If KRA reviews a year, it will ask for the support behind the figures. Our guide to what to expect in a KRA audit describes what that looks like.

Protect them

Tax papers contain your PIN, your income and your account numbers. Keep digital folders protected with a password and avoid sending documents through unsecured apps. If a phone holds your only copy, back it up. A lost phone should never mean a lost record.

Late or missing documents

If a document is missing, ask for a replacement quickly: employers can reissue a P9, banks can reprint statements and suppliers can resend invoices. Penalties for late filing can be avoided only by filing on time, so see KRA penalties and interest explained and plan to finish before the deadline in the 30 June tax deadline.

An hour spent building the system now is worth far more than a weekend spent searching next June.

Share the right documents with the right people

When an accountant, a bank or KRA asks for documents, send only what is requested and keep a note of what you sent and when. Use a secure method, label each file clearly and ask for confirmation that it arrived. If you ever need to prove that you responded on time, that small record is the evidence. Do not hand over originals unless you must; give copies and keep the paper safe.