Create professional developer invoices — hourly rates, sprint billing, day rates, retainer contracts — in USD, GBP, EUR, INR, or PKR. For freelance developers, software engineers, and IT contractors. No signup, no watermark, free forever.
Are you charging market rate? Global benchmarks by level:
| Level | US (USD) | UK (GBP) |
|---|---|---|
| Junior Developer | $200–450/day | £200–350/day |
| Mid-level Developer | $450–800/day | £350–600/day |
| Senior Developer | $800–1,500/day | £600–1,000/day |
| Tech Lead / Architect | $1,200–2,500/day | £900–1,800/day |
| AI/ML Specialist | $1,500–3,000/day | £1,000–2,000/day |
* Market rates 2026. AI/ML, security, and blockchain specialists command 30–50% premiums. Longer contracts typically 10–20% lower.
List each task with hours and brief description: "Bug fix: checkout payment timeout — 3.5 hrs @ $120/hr = $420" and "Performance optimization: API response time — 2 hrs @ $120/hr = $240." Bill weekly or bi-weekly to keep cash flowing. For ongoing maintenance retainers, bill monthly upfront for X hours reserved, then separately for hours used beyond the retainer. Granular task descriptions also protect you — if a client disputes a charge, you have a clear audit trail.
IR35 (UK) is tax legislation that determines whether a contractor should be treated as an employee for tax purposes. If your contract falls "inside IR35," the hiring company deducts income tax and NI from your pay before invoicing — your invoice is still full rate, but you receive net. If "outside IR35," you invoice the full amount and handle your own taxes. Since April 2021, medium/large private sector companies determine IR35 status (not contractors). If you're contracting via a PSC (Personal Service Company), get each contract assessed. IR35 does not apply to genuinely self-employed freelancers with multiple clients.
Ltd company (outside IR35): more tax-efficient — pay yourself a mix of salary + dividends to minimise NI/income tax. Higher admin overhead (annual accounts, Corporation Tax returns). Better for rates over £500/day consistently. Sole trader: simpler, lower admin. Income taxed via Self Assessment. Less tax-efficient at higher rates. IR35 doesn't apply to genuine sole traders with multiple clients. For most UK developers earning over £50k/yr from contracting, a Ltd company usually saves £5,000–15,000/yr in tax.
Invoice in USD. Complete a W-8BEN form (not W-9 — that's for US persons) and provide it to the company before your first invoice. This prevents 30% US withholding tax on your payments. Set up a Wise, Payoneer, or Mercury (US bank account for non-residents) to receive USD without high conversion fees. Include payment instructions in your invoice notes with your receiving account details. US tech companies are used to hiring globally and process W-8BEN routinely — don't let this step delay you starting work.