Free Freelance Rate & Late-Fee Calculator
Work out the hourly rate that actually pays your salary, taxes and time off — then, when a client pays late, the exact late fee and a ready-to-send reminder email. No sign-up, nothing leaves your browser.
A · What should you charge per hour?
Everything updates as you type. The rate is rounded up to the nearest $5 — nobody ever went broke rounding up.
Your hourly rate
$80
Exact rate before rounding: $79.06/hr · based on 100 billable hours a month
Project quotes use the rounded rate, so they’re the numbers you’d actually put in a proposal.
B · Client paying late? Fee + reminder email
The reminder’s tone escalates on its own: under 14 days it’s polite, 14–30 days firm, over 30 days a final notice. Only charge a fee that was in your contract or proposal — see the guide below.
Late fee: $5.00 · Total now due: $1,005.00
Reminder tone: Polite
Tired of chasing invoices by hand?
This calculator works out one late fee at a time. FreshBooks does it automatically — it applies the late fee, sends the reminders on schedule and shows you exactly who owes what, so the chasing stops being your evening job.
See FreshBooks →How the rate math works (and why most freelancers undercharge)
Most people set their rate backwards: they take the salary they’d like, divide by 40 hours a week, and quote that. It feels fair — until taxes, software bills and unpaid admin time eat a third of it. This calculator runs the numbers in the right order. Start with the take-home pay you actually want. Add your monthly business expenses and a profit margin, because break-even isn’t a business. Then gross it up for tax: at a 20% tax rate you keep 80 cents of every dollar, so the revenue target gets divided by 0.8, not just topped up by 20%.
The other half of the trap is billable hours. A 40-hour week is not 40 billable hours — proposals, email, invoicing and dead-end sales calls never get invoiced. For most solo freelancers, 20–25 billable hours a week is honest, and weeks off shrink it further: four weeks off at 25 hours a week leaves just 100 billable hours a month. That’s why the rate looks high at first glance: it’s not greed, it’s arithmetic.
Worked example
Take the defaults above: $5,000 take-home, $500 expenses, 15% margin, 20% tax. So ($5,000 + $500) × 1.15 ÷ 0.8 = $7,906.25 of revenue needed monthly. Over 100 billable hours that’s $79.06 an hour, rounded up to a headline $80 — a $640 day rate and $94,875 a year. Quote $50 because it “sounds reasonable” and you’ve silently taken a $29-an-hour pay cut.
When to charge late fees
A late fee only works if it was agreed before the work started — in your contract, proposal or terms. Put the percentage and grace period in writing (1.5% a month is a common, defensible figure) and the fee becomes routine instead of an awkward surprise. Remind early and politely, and escalate the tone, not the temper — the emails above follow that ladder for you. Most late payments are disorganisation, not malice, which is why the first reminder assumes the best.
Our free Customer Support Reply Generator handles the other side of the inbox — refunds, complaints and replies that eat your afternoon.
Frequently asked questions
Why shouldn’t I just divide my old salary by 40 hours?
Because an employer quietly paid your taxes, tools, insurance and holidays on top of that salary. As a freelancer all of that comes out of your rate — dividing by realistic billable hours, after grossing up for tax and margin, is what stops the slow leak.
Should I quote the exact rate or the rounded one?
Quote the rounded one. $80 reads as confident and is easier to approve than $79.06, and the small round-up builds a buffer for scope creep. Keep the exact figure as the floor you don’t drop below when negotiating.
Is 25 billable hours a week realistic?
For most solo freelancers, yes. Some weeks you’ll hit 30, but sales and admin pull the average down. Track your time honestly for a month and use your real average here — better the calculator shocks you than your tax bill does.
Can I charge a late fee if it wasn’t in the contract?
Generally, no — a fee the client never agreed to is hard to enforce. Send the polite reminder anyway, and fix the contract for next time: terms, grace period and fee percentage in writing before work begins. General information, not legal advice.