Tax rules change often, and memory is unreliable. A year after a change, few people remember when it started, what they did about it or why a figure in last year's return looks different from this year's. A tax change log solves this. It is a simple record, kept in a spreadsheet or document, of each change that affects you, what you did and the evidence. It takes minutes to maintain and pays off every time someone asks, "Why did we do it that way?"

What the log is for

The log has several uses. It reminds you what to apply and from when. It explains differences between years, which helps when preparing returns. It gives your accountant or a new employee the history. And it provides evidence of due diligence if KRA asks why you applied a rule in a particular way. If you can show that you identified a change, took advice and acted on a specific date, your position is stronger.

What to record

For each change, write:

  • The change: a one-sentence description.
  • The source: the Act, notice or guidance, with a link or reference.
  • The effective date: when it starts, and any transition rule.
  • Who it affects: you, your staff, your tenants or your customers.
  • The estimated effect: the shillings per month or year, tested with a calculator.
  • The action taken: what you changed, who did it and when.
  • The check: how you confirmed it worked.

How to compare tax rules year on year: a simple method shows how to estimate the effect.

Keep it simple

A spreadsheet with one row per change is enough. Add columns for the date logged and the status. Keep a folder for supporting documents: a copy of the notice, the page of the Act, calculations and any correspondence. The tax records checklist and document log is a ready layout for the documents, and the KRA correspondence and objections log records letters and replies.

When to add an entry

Add a line when a change is announced, when it becomes law and when it takes effect. That way you can see the stages. From budget day to payslip explains why the stages matter. Update the status as you act. Do not wait for the perfect description; a short note is better than none.

Record the checks

After a change takes effect, check the first payslip, invoice or return and note the result. Use the PAYE calculator or the VAT calculator to verify the figures. If you found an error, record what it was and how you fixed it. Errors found early are cheap to fix.

Any new deadline from a change should go into your calendar and into your filing schedule; see KRA filing calendar for small businesses and the KRA filing and payment calendar. Note penalties for missing them with the KRA penalty calculator.

Use it with your adviser

Share the log with your accountant before you file or at year end. They can confirm that each change has been applied and highlight any you missed. It makes their work faster and cheaper. When to hire an accountant or tax agent explains how to work with one.

Use it for contracts and pricing

If a change affected your prices or contracts, record what you told customers or tenants and when. How tax changes affect your contracts and prices explains how to handle these. The log shows you applied the new rule from the right date.

Review once a year

At year end, read through the log. Which changes mattered? Which cost you time? Did you catch each one on time? Use the answers to improve your routine. A year-end compliance checklist for individuals and year-end tax planning checklist for small businesses include a step to review changes. A good log is short, honest and up to date, and it turns a confusing stream of changes into a clear record.

A small example

Suppose a statutory deduction changes from the start of a month. In the log, you note the change and its source, the date it starts, the estimated effect on a typical salary, the action to update payroll and the check of the first payslip. Six months later, when an employee asks why take-home pay moved, you can answer in a minute with evidence. That is the whole value of the log: a few lines written once, used many times.