The oldest freelance rule: when an invoice is paid, move a fixed percentage into a separate account before the money feels like yours. This tool tells you how much, with country presets you can override.
30% covers federal income tax plus the 15.3% self-employment tax for most mid-income freelancers; state tax varies.
Put away for tax
$1,200
From a $4,000 invoice at 30%
Each preset is a prudent flat set-aside for a mid-income sole trader — enough to cover income tax plus self-employment contributions without fine-tuning:
These are starting points, not tax advice: your effective rate depends on income level, deductions, and (in federal countries) your state or province. High earners should round up; freelancers with heavy deductible costs can often round down. When in doubt, set aside more — an over-funded tax account is a bonus in April, an under-funded one is a debt.
If the percentage feels painful, the problem is usually the rate, not the tax. Our rate calculator builds the tax buffer into what you charge, so the set-aside comes out of the client’s number rather than your salary.