| Scenario | Gross (annual) | Taxes + social | Expenses + fees | Estimated net |
|---|---|---|---|---|
| Daily rate, moderate deductions | $135,200.00 | $36,504.00 | $9,356.00 | $89,340.00 |
| Hourly rate, higher downtime | $118,800.00 | $30,888.00 | $10,200.00 | $77,712.00 |
| Daily rate, higher retirement savings | $135,200.00 | $33,150.00 | $16,116.00 | $85,934.00 |
- Pick hourly or daily billing, then enter your contract rate.
- Set billable days and weeks, then subtract unpaid days off.
- Add realistic annual costs: tools, travel, insurance, memberships.
- Enter effective income tax and social contribution rates.
- Model agency fees as percent or fixed annual amount.
- Press Calculate, then export CSV or PDF.
Rate and utilization drive gross income
Gross pay scales with your rate and with utilization. A daily rate of 650 across 5 billable days and 46 weeks yields 650 × (5×46 − 10) = 143,000 before deductions. If you bill hourly at 80 for 8 hours, the same schedule produces 80 × 8 × 220 = 140,800. Small changes in downtime can outweigh small rate changes.
Downtime is the silent cost center
Assume two gaps of 2 weeks each plus 10 unpaid days off. That reduces billable weeks from 50 to 46 and reduces days by another 10. On a 650 daily rate, losing 20 extra days costs 13,000 gross. Keeping a realistic utilization target, such as 80% to 90%, creates safer budgets and avoids overcommitting your spending.
Fees and umbrella charges change the baseline
A 3% agency fee on 143,000 equals 4,290. A fixed 1,200 fee may be cheaper at higher income, but more expensive at low income. This calculator lets you compare both models quickly and shows the fee impact as a separate line item for transparency.
Expenses should be annualized, not guessed monthly
Annualizing common contractor costs improves accuracy: 3,500 for tools and software, 1,800 for insurance, and 900 for memberships totals 6,200. If you add 1,500 of training, total costs become 7,700. Tracking these totals helps you negotiate rates using a clear cost-to-serve view.
Effective tax rates simplify planning
Instead of complex brackets, use effective rates as a planning proxy. With taxable income of 120,000 and an effective income tax rate of 22%, estimated income tax is 26,400. Add social contributions of 7.5% for 9,000. The tool also reports effective tax on gross to benchmark your assumptions across offers.
Take-home metrics support better decisions
Net annual, net monthly, and net per billable unit reveal tradeoffs. If net is 89,340 on 143,000 gross, take-home is 62.47%. You can test a higher retirement contribution, lower downtime, or different fee structure and instantly see the net change, then export results to compare multiple client offers consistently.
1) What is the difference between gross and taxable income here?
Gross is billings from your rate and utilization. Taxable income subtracts pre-tax items you enter, including eligible expenses, insurance, retirement, and optionally deductible fees.
2) Which tax rate should I enter?
Use an estimated effective rate from prior returns or a conservative planning rate. If unsure, test a low and high rate to create a safe range for take-home.
3) How should I model downtime between contracts?
Reduce billable weeks per year and add unpaid days off. Many contractors plan for 44–48 billable weeks, depending on market conditions and sales cycles.
4) Should retirement contributions be treated as an expense?
They are modeled as a percent of gross and reduce take-home. If contributions are pre-tax in your jurisdiction, the taxable base can be lowered through the retirement line.
5) Why does the chart show a waterfall view?
A waterfall highlights each deduction’s step-down effect from gross to net. It makes it easier to spot whether taxes, fees, or expenses are driving the biggest changes.
6) Can I use this output for invoicing or compliance filings?
Use it for planning and comparing offers. For invoicing, payroll, or filings, follow local rules and verify details with your accountant or tax advisor.