Net profit after tax: what startup founders need to know

Published October 21, 2025 · 2 min read

Net profit after tax explained for startup founders, with a worked example, a checklist and the mistakes to avoid.

Why this matters for startup founders

Founders make decisions on salary, dividends and equity where tax changes the outcome.

Worked example

Here is the calculation with sample figures. Change any number in the Net Profit After Tax Calculator to run your own.

Net profit after tax: how it works

Net profit after tax is revenue minus costs minus corporate tax.

It is the figure that is available for reinvestment or distribution.

A second example with larger figures

Scaling the inputs up shows how the result moves. Percentages stay the same, so the tax grows in proportion to the amount it is applied to.

Using the calculator step by step

1. Open the Net Profit After Tax Calculator.
2. Enter your own figures on each numbered line.
3. Set the rate to the one that applies to you. Defaults are examples, not advice.
4. Read the result and the formula below it.

Key terms

Tax credit

An amount subtracted directly from the tax bill, worth its full face value.

Standard rate

The rate that applies to most goods and services unless a specific reduced rate, zero rate or exemption applies.

Effective rate

Total tax divided by total income, the average rate you actually pay.

Net amount

The amount before tax is added. On an invoice it is the figure the tax is calculated on.

Exempt supply

A sale that falls outside the tax entirely. No tax is charged and input tax usually cannot be reclaimed.

A quick checklist for startup founders

1. Total revenue.
2. Subtract deductible costs.
3. Apply the corporate tax rate.

Common mistakes to avoid

• Including non-deductible expenses as costs.
• Forgetting tax instalments.

Frequently asked questions

This article is general information for planning, not tax advice. Rates and rules change; confirm with your tax authority or a qualified adviser.