Free Tools for Freelancers, Contractors & Small Businesses
Simple, private calculators and generators that run in your browser. No sign-up, nothing stored.
Overtime Pay CalculatorWork out time-and-a-half, double time and gross pay in seconds.Late Payment Interest & Late Fee CalculatorSee what an overdue invoice now owes with interest and fees.Freelance Hourly Rate CalculatorFind the minimum rate that covers your income, costs and taxes.Free Invoice GeneratorCreate a clean invoice and save it as PDF. No sign-up.Change Order GeneratorMake a printable, signable change order with the new contract total.Scope Creep Cost CalculatorSee how unpaid extras shrink your effective rate and what to charge.Scope Creep & Late Payment Statistics 2026Cited numbers for your proposals, posts and reports.
Why we built these tools
SignedChange helps people put changed agreements in writing and get them signed in a minute. Along the way we kept hearing the same questions: how much should I charge, how do I bill the extra work, how much interest can I add to a late invoice, and what does a change order look like? These free tools answer those questions quickly, on any phone.
Every tool runs fully in your browser. Nothing you type is uploaded, so you can use real client names and numbers safely.
When the job changes, get it signed.
SignedChange turns a verbal change into a PDF both sides sign on their phones in about a minute. Your first 3 documents are free.
Get a change signed free