How Much Should I Set Aside for Taxes on 1099 Income?
Set aside 20% to 25% of your net profit if freelancing is your only income, and 30% to 35% if you also have a W-2 job — then add your state's income tax rate. The single figure everyone repeats, 30%, is too high for most full-time freelancers and too low for most side hustlers.
On $45,000 of net profit with no other income, a single filer owes $8,579.50 in federal tax — 19.1%. Move the same $45,000 alongside a salary and the right figure changes completely.
How it's calculated
The set-aside percentage is not one number because two different taxes stack in different ways.
Self-employment tax is the flat part. It is 15.3% of 92.35% of profit, an effective 14.13%, and it applies from the very first dollar of profit up to the $184,500 Social Security wage base. Nothing shelters it — not the standard deduction, not the QBI deduction. If you set aside nothing else, set aside this.
Federal income tax is the variable part, and it is where the flat rules of thumb break. It applies only to what is left after half your self-employment tax, the standard deduction, and the QBI deduction come off. For a single filer with no other income, that means income tax is zero until profit reaches roughly $17,400. Between there and $50,000 it climbs slowly. A part-time freelancer earning $15,000 of profit needs 14.1%, not 30% — setting aside 30% would idle more than a thousand dollars for a year.
The direction reverses the moment you have a job. Your salary fills the low brackets first, so every dollar of freelance profit is taxed at your top marginal rate. Your W-2 withholding already covers your salary, so what you must fund yourself is only the extra tax the freelance income causes. Earn $80,000 at a job and $20,000 freelancing, and that extra tax is $6,097.23 on the $20,000 — 30.5%. The same $20,000 earned by someone with no job would cost 14.1%.
That is the calculation the tool above performs, and it is the reason its headline is a percentage rather than a bill. It computes your household tax with the self-employment income and without it, and reports the difference against your profit.
Two adjustments are yours to make. State income tax is not modelled here and ranges from zero to over 10%. And if your income is lumpy, set aside from every payment as it arrives rather than saving a quarterly lump — a percentage moved on the day money clears survives a slow month in a way a good intention does not.
Where the money goes matters less than that it leaves your spending account. A separate high-yield savings account is enough. Our guide to budgeting with irregular income covers the quarterly due dates and the safe-harbour rule, and the 1099 tax calculator shows the full breakdown behind the percentage.
A worked example
Two people each earn $20,000 of freelance profit in 2026. The first has no other income: their self-employment tax is $2,825.91, the standard deduction wipes out nearly all their income tax, and their total federal bill is $3,024.87 — a 15.1% set-aside.
The second already earns $80,000 in a salaried job. Their self-employment tax on the same $20,000 is identical at $2,825.91, but the profit stacks on top of their salary in the 22% bracket, so the freelance income adds $6,097.23 to the household bill once income tax is counted.
That is a 30.5% set-aside on the same $20,000 of work — double the first person's rate, for identical income.
Common mistakes to avoid
- Applying 30% to everything. It over-saves for a full-time freelancer under $50,000 of profit and under-saves for almost anyone with a day job.
- Setting aside a share of gross invoices rather than profit. If you have real expenses, the percentage applies to what is left after them — otherwise you are saving against money you already spent on the business.
- Forgetting state income tax. Every percentage here is federal. In a high-tax state the real figure can be five to ten points higher.
- Waiting to save until the quarterly due date. Income that arrives unevenly gets spent unevenly; moving the percentage the day each payment clears is what makes the quarterly payment possible.
- Ignoring the effect of a spouse's income. On a joint return your profit stacks on the household total, which can push the set-aside rate several points higher than a single-earner estimate.
Frequently asked questions
Should I set aside 30% for 1099 taxes?
Only if you also have a W-2 job or earn well into six figures. For a full-time freelancer with no other income, 20% to 25% of net profit covers federal tax at typical earnings, and under about $17,400 of profit the real figure is just the 14.1% self-employment tax. With a day job, 30% to 35% is right, because freelance income is taxed at your top marginal rate on top of your salary. Add state tax to any of these.
Do I set aside a percentage of gross income or profit?
Profit — gross income minus business expenses. Tax is calculated on Schedule C net profit, so saving a percentage of gross over-saves by exactly your expense ratio. The practical method is to estimate your expenses as a share of revenue, then apply the set-aside percentage to the remainder of each payment as it arrives.
Where should I keep money set aside for taxes?
A separate savings account that is not your spending account, ideally one paying interest. The point is friction: money in your checking account gets spent, and the quarterly payment then has to come out of next month's income. Some freelancers use a dedicated business savings account and transfer the set-aside percentage the day each client payment clears.
How much should I set aside if my income varies every month?
Set aside a fixed percentage of every payment rather than a fixed dollar amount per month. A percentage self-adjusts: a big month contributes more, a lean month contributes less, and you never have to predict the year in advance. Recheck the percentage mid-year — if income has run well above or below plan, the right rate has moved with it.
What if I set aside too much?
You get it back, either as a refund or as a smaller final quarterly payment. Over-saving costs you only the interest on the surplus, which is why erring high is the safer mistake. Under-saving costs you the shortfall plus a possible underpayment penalty, at a moment when the money has already been spent.
Sources
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