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Self-employment tax reserve

How much should a self-employed worker reserve from profit?

Your numbers

$
%
%

Tax reserve

$8,206

Keep after reserve$13,794
Combined reserve rate37.3%

Tip. Move the reserve out of your checking account the week the client pays, not the week the bill is due.

Assumptions

  • Reserve = profit × (SE rate + income tax reserve rate).
  • Simplified; ignores deductions, credits, and taxable wage base caps.
  • Estimate only. Tax and payroll rules vary by country, state, and year, and this page uses the rates you enter rather than a filing engine's tables.

Explore the numbers

Examples and charts

Start with a scenario, then read the response curve to see which input actually moves the answer.

Example 1

Side income

A modest quarter of freelance profit at a lower income-tax reserve.

Tax reserve

$1,638

Example 2

Full-time freelance

A solid quarter with a mid-bracket income tax reserve.

Tax reserve

$8,206

Example 3

High-tax state

The same profit with state income tax folded into the reserve rate.

Tax reserve

$10,406

Sweeps income tax reserve rate from half to one and a half times your value, holding everything else fixed.

Response curve

How income tax reserve rate moves the result

Tax reserve

$8,206

$6.0k$7.0k$8.0k$9.0k$10k$11k15%20%25%30%
Chart axis: Income tax reserve rateNow 22% → $8.2k

What this calculates

Helps freelancers and contractors park a share of profit for self-employment tax plus an income-tax reserve, so quarterly payments stop feeling like an ambush.

How to use it

  1. Start with quarterly profit and work down the form, or load an example to begin from a realistic case.
  2. Read the headline result alongside the supporting rows, which show the intermediate figures behind it.
  3. Check the assumptions. They decide what the number includes and, more importantly, what it leaves out.
  4. Sweep income tax reserve rate on the response curve to see how much it actually moves the answer.
  5. Run a cautious case as well as an optimistic one before using the estimate in a decision.

Common mistakes

  • Spending profit before funding the tax bucket.
  • Reserving only for income tax and forgetting self-employment tax entirely.
  • Keeping the reserve in the same account as operating cash, where it quietly gets spent.

Formula

Reserve = profit × (self-employment rate + income tax reserve rate)

Inputs

  • Quarterly profit
  • Self-employment tax rate (%)
  • Income tax reserve rate (%)

FAQ

Is 15.3% always right for self-employment tax?

It is the headline combined Social Security and Medicare rate, and it is a reasonable planning default. The real figure is lower in practice because it applies to about 92.35% of net earnings and half of it is deductible, and the Social Security portion stops above an annual wage base.

Does this replace quarterly estimated payments?

No. It sizes the money to set aside. You still have to send the payments on the due dates, and in the US missing them can trigger an underpayment penalty even if you settle up in April.

Should I reserve on revenue or profit?

Profit, meaning revenue minus deductible business expenses. Reserving on revenue drastically over-collects if your costs are meaningful.

What if my income is uneven across the year?

Reserve from each payment as it arrives rather than estimating a flat annual figure. The irregular income budget calculator pairs well with this for setting the spending side.

Are these numbers financial advice?

No. They are educational estimates based on the inputs and assumptions on this page. Confirm important decisions with a qualified professional and your own documents.

Read the full guideHow much to set aside for self-employment tax

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