How to use it
- Use the formula below with your own figures.
The formula
Tax applies to net self-employed profit.
Worked example
Set aside a share of each payment for tax.
Frequently asked questions
Why set money aside?
No employer withholds it for you.
Deduct expenses?
Yes — tax applies to profit, not revenue.
Tips
- Know your marginal vs effective rate.
- Set money aside as you earn if tax isn't withheld.
- Keep receipts for anything deductible.
Key terms
- Marginal rate
- The rate on your top slice of income.
- Effective rate
- Your overall average tax rate.
- Deduction
- An amount subtracted from taxable income.