Documentation
Everything you need to get value from Stack Freelance — no manual required.
Get started
- 1
Pick a tool. Start with the Rate Calculator, Invoice Generator, or the Tax Estimator — every tool on the tools page works without an account.
- 2
Create a free account when you want to save results. Saved rate cards, invoices, and time logs live in your dashboard, and anything you save on the free plan stays there if you upgrade.
Featured tools
Rate Calculator
Calculate your optimal hourly, project, or retainer rate based on income goals, expenses, and working hours.
Late Payment Interest Calculator
Calculate statutory interest on overdue invoices. Generate a formal demand letter instantly.
Invoice Generator
Create professional invoices with dynamic line items, auto-calculations, and PDF download.
Frequently asked questions
Do I need an account to use the tools?
No. All 28 tools work instantly with no signup. Create a free account only if you want to save your calculations, generate invoices, or track time across sessions.
What does the free plan include?
Free access to the Rate Calculator, Invoice Generator, Tax Estimator (limited), Time & Profit Analyzer, Contract Risk Scanner, and free template downloads. Your data stays yours — export it anytime.
How does billing work?
Pro is $12/month or $8/month billed annually, with a 30-day money-back guarantee. Enterprise is $29/month for teams. Cancel anytime from your dashboard; you keep access until the end of your billing period.
Is my data secure?
Payments are processed by Stripe, authentication by Clerk, and data is stored encrypted. We never sell your personal information — see our Privacy Policy for details.
What is the API for?
Pro and Enterprise plans include API access so you can pull invoices, time logs, and rate cards into your own scripts or apps. Manage your API keys from the API page in your dashboard after signing in.
Still stuck?
We read every message and typically reply within one business day.
Contact support