Rex says
Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.
Try a scenario
Click to load — tweak from there.Inputs
Result
Set aside per quarter
$8,212
Total annual tax
$32,847
Self-employment tax
$13,423
Income tax
$19,423
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How to use this
- 1Enter expected annual net profit ($).
- 2Enter self-employment tax rate (%).
- 3Enter income tax rate (%).
- 4Enter credits / withholding already paid ($).
- 5Read your set aside per quarter on the right — it updates as you type.
- 6Hit Share to keep the scenario or send it to someone.
About this calculator
Self-employed income has no withholding, so quarterly payments are on you. This estimates the quarterly set-aside from net profit, self-employment tax and your income bracket. Educational only.
Worked example
Using the values the calculator loads with:
Inputs
- Expected annual net profit: 95000 $
- Self-employment tax rate: 15.3 %
- Income tax rate: 22 %
- Credits / withholding already paid: 0 $
Results
- Set aside per quarter: $8,212
- Total annual tax: $32,847
- Self-employment tax: $13,423
- Income tax: $19,423
What each field means
Inputs
- Expected annual net profit ($)
- The expected annual net profit used in the calculation, measured in $. Starts at 95000 $ so you have a working example on load.
- Self-employment tax rate (%)
- The self-employment tax rate used in the calculation, measured in %. Starts at 15.3 % so you have a working example on load.
- Income tax rate (%)
- The income tax rate used in the calculation, measured in %. Starts at 22 % so you have a working example on load. Accepted range: 0–50 %.
- Credits / withholding already paid ($)
- The credits / withholding already paid used in the calculation, measured in $. Starts at 0 $ so you have a working example on load.
Results
- Set aside per quarter
- Returned as a money amount in US dollars and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Total annual tax
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Self-employment tax
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Income tax
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
How does the quarterly estimated tax calculator work?
Self-employed income has no withholding, so quarterly payments are on you. This estimates the quarterly set-aside from net profit, self-employment tax and your income bracket. Educational only. The underlying maths is: SE tax = profit × 92.35% × 15.3%. Income tax applies after half the SE tax deduction.
What do I need to enter?
4 values: expected annual net profit, self-employment tax rate, income tax rate, and credits / withholding already paid. Each field starts with a sensible default, so you can change one number at a time and watch the result move.
What does the set aside per quarter result mean?
It is returned as a money amount in US dollars and updates live as you edit the inputs, so you can compare two or three versions of a scenario in a few seconds.
Is this calculator free, and do I need an account?
Yes, it's free, and no account is required. Nothing you type is stored on our servers — the maths runs entirely in your browser.
How accurate is the result?
It applies the standard formula exactly, so the arithmetic is precise. Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
Who is this tool for?
It's built for anyone comparing money scenarios before committing — budgeting a payment, sanity-checking a quote, or seeing what a change in rate or term actually costs.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Quarterly Estimated Tax Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/self-employed-quarterly-set-aside
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/self-employed-quarterly-set-aside" target="_blank" rel="noopener">Quarterly Estimated Tax Calculator — RevenueLab</a> (2026).</p>
Source: [Quarterly Estimated Tax Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/self-employed-quarterly-set-aside) (2026).