You do not strictly need to buy anything to price your freelance work — a blank spreadsheet and an afternoon can get you a defensible number. But the free route has predictable failure points, and for the price of one undercharged invoice, a pre-built calculator removes them. Here is the honest comparison so you can decide which is worth your time.
If you are disciplined, a spreadsheet is genuinely fine. You control every assumption, you can model your exact tax situation, and it is free. For a freelancer with one rate, one currency, and the patience to research self-employment tax, a clean spreadsheet does the job.
| Factor | DIY spreadsheet (free) | Pre-built calculator (paid) |
|---|---|---|
| Upfront cost | $0 | One-time, ~$19 |
| Time to a trustworthy number | An afternoon of research | Minutes |
| Billable-hours logic | You must build it | Built in |
| Tax + overhead lines | Easy to forget | Pre-listed |
| Hourly ⇄ day ⇄ project | Manual | Automatic |
| Risk of undercharging | High | Low |
Stay DIY if you enjoy spreadsheets, have a simple single-rate business, and have already researched your tax obligations. There is no shame in it — a careful free sheet beats a paid tool you ignore.
If you have ever quoted a number and later realized it did not cover your taxes, or you freeze when a client asks for a project price, the paid route earns its cost on the first corrected quote. The math is simple: undercharging by even $5/hr across 1,000 billable hours is $5,000 a year. A one-time ~$19 tool that catches that is not a close call.
If you have ever undercharged because you forgot taxes, downtime or used total instead of billable hours, yes — undercharging by $5/hr over 1,000 hours is $5,000/year, far more than a one-time ~$19 tool.
Yes, if your business is simple and you research self-employment tax and billable-hour ratios yourself. The risk is the omissions a blank sheet doesn't remind you about.
Built-in billable-hours logic, pre-listed tax and overhead lines, and automatic conversion between hourly, day and project rates — the parts people forget when building from scratch.
Published 2026-06-14 by OrgScanner. Independent guide; the linked products are ones we make. Updated as pricing and outreach norms shift.