Freelancer Invoice Calculator

Calculate freelance invoice totals with hourly/project rates, expenses, and payment terms.

By Konstantin Iakovlev · Updated September 2026 · Source: IRS — Gig Economy Tax Center

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Total Due

$3,000.00

Due Date

Nov 7, 2026

Invoice Summary

Subtotal$3,000.00
Total due$3,000.00
Payment termsNet 30
Late fee (1.5%/mo)$45.00

Use the Freelancer Invoice Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.

Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.

How It Works

Getting an invoice total right is more than arithmetic when your reputation rides on it. The tool handles hourly or fixed-fee pricing, an optional discount and reimbursable expenses, so your time, expertise, and out-of-pocket spending all show up in the final number.

Under the hood, the calculation aggregates each billable component. Hourly projects multiply your rate by the hours worked; fixed-scope projects simply carry your agreed project rate. A discount, if you enter one, comes off that fee, and reimbursable expenses are then added at cost to give the total due; no sales tax is added. The calculator also shows the due date under Net 15, 30 or 60 terms counted from today, and what a 1.5% monthly late fee would come to.

Two habits prevent most billing disputes. Verify your rate and your logged hours before sending, since a small slip in either direction quietly costs you or annoys the client. Itemize every expense rather than folding them into a vague lump, and state your payment terms plainly on the invoice so nothing stalls the payment.

Example: Web Design Project Invoice Calculation

  1. 1 Input: Hourly Rate: $85/hour, Hours Worked: 30, Project Rate: $0 (N/A), Expenses: Domain Registration $15, Stock Photos $45, Payment Terms: Net 30.
  2. 2 Calculation: (30 hours * $85/hour) + $15 (domain) + $45 (photos) = $2550 + $60 = $2610.
  3. 3 Result: The total invoice amount due is $2610.
  4. 4 Context: This invoice reflects a comprehensive web design project, detailing both labor and essential third-party costs. The Net 30 payment terms mean the client has 30 days from the invoice date to remit payment.

Source: IRS — Gig Economy Tax Center · Last updated: September 2026

Frequently Asked Questions

What should a freelancer invoice include?
A professional invoice should include your business name, client name, invoice number, date, itemized services with rates, total amount, payment terms (Net 15 or Net 30), and payment method details.
Should freelancers charge sales tax on invoices?
It depends on your state and service type. Most states do not tax professional services, but some states like Texas, Hawaii, and New Mexico tax certain services. Check your state's tax authority for rules.
What are standard payment terms for freelancers?
Net 30 (payment due within 30 days) is the most common term. Net 15 or due upon receipt are reasonable for new clients. Consider offering a 2% discount for payment within 10 days to encourage promptness.

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