Your numbers
Quick answer
What does the Self-employment tax reserve calculate?
How much should a self-employed worker reserve from profit? This calculator uses monthly business revenue, deductible business expenses, and tax reserve rate to estimate reserve from business profit immediately in your browser.
With the values currently entered, the result is $1,848.00 — monthly tax reserve. It also shows estimated monthly profit, and annual reserve at same pace.
How to use the Self-employment tax reserve
- Replace the example values with your own numbers.
- Review the result and supporting figures as they update automatically.
- Check the formula and assumptions before using the estimate for a decision.
Inputs used
- Monthly business revenue
- Deductible business expenses
- Tax reserve rate — entered in %
Self-employment tax reserve formula
(Revenue − deductible expenses) × entered reserve rate
Assumptions
- Expenses entered are eligible under local rules.
- The reserve rate is user-supplied and not tax advice.
Verify the inputs
Authoritative sources
These sources explain the definitions, factors, or rules behind this tool. Their geographic scope is shown because an official source for one country is not automatically valid somewhere else.
Sources do not endorse Calculum. Check the source date, scope, and your own documents before making a financial, tax, insurance, or reporting decision.
Practical guide
Self-employment tax reserve example and edge cases
How much should a self-employed worker reserve from profit? Let's use a concrete example, then look at the assumptions that can move the answer.
Example: A practical self-employment tax reserve scenario
For this example, use monthly business revenue of 9,000, deductible business expenses of 2,400, and tax reserve rate of 28 %. These are starting values, so replace them with numbers that match your situation.
- Monthly business revenue
- 9,000
- Deductible business expenses
- 2,400
- Tax reserve rate
- 28 %
Calculated result$1,848.00monthly tax reserve
Start with monthly tax reserve. Then check estimated monthly profit, and annual reserve at same pace to understand what sits behind the main result.
Example results use the default display profile. The calculator above follows your selected country and units.
How to read the result
- Read the main result first. The supporting figures for estimated monthly profit, and annual reserve at same pace explain how the estimate is built.
- The method is (Revenue − deductible expenses) × entered reserve rate. Keep the units consistent and use values from the same time period.
Edge cases worth checking
When monthly business revenue is unusual
Expenses entered are eligible under local rules. Double-check this input before relying on the result.
When tax reserve rate is uncertain
The reserve rate is user-supplied and not tax advice. Run a lower and higher value to see a useful range.
What changes the result most
Monthly business revenue
Use a current amount for monthly business revenue. Include fees or recurring costs that belong in the same figure.
Deductible business expenses
Use a current amount for deductible business expenses. Include fees or recurring costs that belong in the same figure.
Tax reserve rate
Test a lower and higher tax reserve rate. A small percentage change can move the final result more than expected.
Try a different scenario
Small changes show whether the answer is stable or sensitive.
Monthly business revenue: 10% lower
8,100$1,596.00monthly tax reserve
Monthly business revenue: 10% higher
9,900$2,100.00monthly tax reserve
Deductible business expenses: 10% higher
2,640$1,780.80monthly tax reserve
Common mistakes
Check monthly business revenue
Expenses entered are eligible under local rules. Make sure this matches the number you enter.
Keep tax reserve rate consistent
The reserve rate is user-supplied and not tax advice. Use the same units and time period throughout the calculation.
Do not rely on one self-employment tax reserve scenario
Run a cautious case and an optimistic case. The range is often more useful than one exact-looking number.
Use this result well
How much should a self-employed worker reserve from profit?
It is not a tax return or payroll ruling. Check the current rules for your country.