About

Why it exists

On 1 January 2026 the Nigeria Tax Act 2025 and its companion Acts replaced most of what people knew about Nigerian tax. The Consolidated Relief Allowance went. Rent relief arrived. Minimum tax on individuals disappeared. The small-company threshold moved — to two different places, depending on which tax you are asking about. Most of the summaries written about it are wrong in at least one detail, and the ones that are right rarely show you where their numbers came from.

So: 24 calculators, every figure derived line by line, every rate stamped with the section it comes from and the date we last checked it.

Who it is for

Salary earners

What is my take-home now, and did the reform help or hurt me?

Freelancers, gig workers and traders

What do I owe, and how much should I set aside?

Small business owners

Am I a small company? Do I pay anything at all? What do I file, and when?

Bookkeepers, accountants and payroll staff

Fast, defensible computation with a visible audit trail.

How it is built

• Every rate lives in one place. No threshold or band is written into a calculator. They all come from a single configuration keyed by tax year, which is why the regime switch on each tool is trustworthy rather than approximate.
• The engines are tested against worked examples. Each calculator sits on a pure function with a golden-vector test suite. If a number changes, a test fails.
• Nothing is sent anywhere. All computation is in your browser. See privacy.
• Contradictions are surfaced, not resolved. Where the Acts genuinely conflict, we show you both readings and tell you which we used.

What it will not do

It will not file for you, store your data, give you advice, or tell you what the reform ought to have been. It states the number and names the rule. What you do about it is between you and a qualified professional — see the disclaimer.