I used four different time trackers before I noticed the actual problem.
It wasn't that Toggl was bad. It wasn't that Clockify's reports were ugly. The timers all worked fine. The problem was what happened after the timer stopped: I had a list of tracked hours in one app, and I still had to open a completely different app to turn those hours into an invoice.
Every week, same routine. Stop the timer. Export a CSV. Open my invoicing tool. Re-type the hours. Double-check the maths. Send. That "quick five minutes" was actually closer to twenty, every single week, for a task that should have taken one click.
If you bill hourly as a freelancer, this guide is about picking a time tracker that doesn't leave you doing that same manual handoff.
Why time tracking matters more than freelancers think
If you're not billing hourly, you might think time tracking doesn't apply to you. It still does, for three reasons.
You can't price fixed-fee work accurately without knowing your real hours. Most freelancers who quote flat rates are guessing based on gut feel. A few weeks of honest time tracking on a project tells you whether you're actually charging enough — or quietly working for less than minimum wage on the projects that always run long.
Disputes get resolved by evidence, not memory. If a client ever questions an invoice, "I worked about 12 hours on this" loses to a timestamped log with task descriptions every time.
You find the clients who are secretly unprofitable. Time tracking is the only way to see that "quick favour" client is actually costing you four unpaid hours a month in small requests that never got billed.
What I actually tested
I used each of these for real client work, not a five-minute demo click-through. Here's where they stood out and where they fell short.
Toggl Track — the cleanest standalone timer
Toggl Track is the timer most freelancers reach for first, and for good reason. The interface is fast, the browser extension starts and stops timers from wherever you're working, and the reporting is genuinely good — you can slice hours by client, project, or tag in a couple of clicks.
The free plan covers one user with unlimited tracking, which is plenty for a solo freelancer. Where it stops is billing: Toggl Track has no invoicing of its own. You track the hours, export them, and go do the invoice somewhere else. For someone who bills hourly every week, that export-and-re-enter step is exactly the friction that adds up.
Clockify — the most generous free tier
Clockify's free plan is hard to beat on paper: unlimited users, unlimited tracking, reasonable reports, all for £0. If budget is the only concern and you're tracking time for personal reference rather than billing directly from the tool, Clockify is a fine choice.
The trade-off is the same as Toggl: it's a timer, not a billing system. And the free-tier UI leans a little more cluttered than Toggl's, with more upsell prompts nudging you toward paid tiers you may not need.
Harvest — the closest thing to all-in-one, with a catch
Harvest does more than track time — it can turn tracked hours directly into an invoice, which solves the exact handoff problem this guide started with. The invoicing is genuinely decent, and the reporting on billable vs. non-billable time is some of the best in this list.
The catch is price and scope. Harvest starts around $13.75/month per seat once you're past the free single-project tier, and it's still just time tracking plus invoicing — no contracts, no proposals, no client portal, no CRM. You'll still be running a second (or third) tool alongside it for the rest of your client workflow.
All-in-one platforms — one login, one invoice, one place hours live
This is where I ended up. Tools like SoloPad, Bonsai, and Dubsado build time tracking directly into the same platform where you send proposals, sign contracts, and invoice clients. The practical difference is small but constant: a tracked hour becomes a line item on an invoice without you touching a spreadsheet.
SoloPad's time tracker isn't as deep as Toggl's on reporting — if you need granular team-level analytics across a large team, a dedicated tool still wins. But for a solo freelancer or small team, having time tracking, invoicing, contracts, and proposals under one login at £5/mo removes an entire weekly task rather than just doing it slightly faster.
Time tracking software comparison
| Tool | Starting price | Invoicing built in? | Best for |
|---|---|---|---|
| Toggl Track | Free (paid from $9/mo) | No | Cleanest standalone timer and reports |
| Clockify | Free (paid from $3.99/mo) | No | Budget-conscious tracking, unlimited users |
| Harvest | Free (1 project), then $13.75/mo | Yes | Time-to-invoice without a full business suite |
| Bonsai | From $25/mo (Essentials) | Yes | Time tracking plus tax tools, US-focused |
| SoloPad | £5/mo, all features included | Yes | Time tracking + invoicing + contracts + proposals in one place |
How to actually pick one
Ask yourself two questions before anything else.
Do you bill hourly, or do you just want to know where your time goes? If it's the second, Clockify or Toggl's free tier is genuinely enough. Don't pay for invoicing features you won't use.
Does tracked time need to become a client-facing invoice? If yes, every extra minute between "timer stopped" and "invoice sent" is a minute you're paying yourself to do data entry. That's the case for Harvest or an all-in-one platform over a standalone timer.
A smaller thing worth checking: does the tool track idle time and let you edit entries after the fact? Everyone forgets to stop a timer eventually. A tool that makes it easy to fix a six-hour "lunch break" entry saves you from either an awkward client conversation or a quiet loss of billable time.
The habit matters more than the tool
Whichever tool you pick, the software isn't what gets you paid faster. The habit is.
Track time as you work, not from memory at the end of the week — memory rounds in the client's favour, not yours. Write a one-line task description on every entry, so a report six weeks from now still means something. And review your tracked hours against what you actually invoiced at least once a month; it's the fastest way to catch scope creep before it becomes a free favour you do every time.
If you want the tracked-hours-to-invoice step to disappear entirely, that's the one feature worth paying for. Everything else on this list is a preference. That one is a genuine time saver, every single week, for as long as you freelance.
SoloPad tracks time and turns it straight into an invoice — no export, no re-entry. Invoices, contracts, proposals, CRM, and time tracking, all at £5/mo. Try it free for 30 days.