If you bill by the hour, every unlogged hour is money you worked for and will not see. Here is a practical method for tracking billable time so you invoice everything you earned and keep clean records for tax time.
The freelancers who undercharge are usually not the ones with low rates. They are the ones who lose track of hours: the 20-minute call, the quick revision, the email that turned into an hour of work. None of it gets billed because none of it got written down. A simple tracking habit turns that lost time back into income.
Tracking also tells you something your rate alone cannot: your real effective hourly rate, once admin and unpaid work are counted. That number is what shows you whether a client is worth keeping.
Before you track anything, settle what you bill for. Client tasks, revisions, and calls are usually billable. Your own admin, marketing, and bookkeeping usually are not. There is no single right answer, but you need a consistent one so similar work is always treated the same way.
Tracking the non-billable work too is worth the small extra effort. It is the only way to see your effective rate, and it shows you where your unpaid time actually goes.
The single most important rule: log time as you go, not from memory at the end of the week. Memory rounds down, and the small blocks are the first to disappear. Start a timer when you begin a task, or write the start and end times the moment you finish.
A timer is the most accurate option because it removes the guesswork. Manual entry works fine too, as long as you do it the same day. Flexible time formats help here: being able to type "9am", "1730", or "5p" instead of fiddling with a clock widget means you actually record the entry instead of putting it off.
Every block of time should be linked to a client and a short note on what it was for. The note is not busywork: it becomes the line item your client reads on the invoice. "Drafted homepage copy" is a billable line a client understands; an untagged hour is a question you will have to answer later.
Most freelancers round time to an increment, commonly 6 minutes (a tenth of an hour), 10 minutes, or 15 minutes. Any of these is fine. What matters is applying the same rule to every entry. Consistent rounding is predictable for your client and defensible if an invoice is ever questioned.
Add up your hours per client on a set cadence, weekly or monthly, and turn them into an invoice. A regular schedule does two things: it catches hours before you forget them, and it keeps your income steady instead of lumpy. If your tracker stores each client's rate, the timesheet and the invoice total build themselves.
Your hourly income is part of the business income you report on Schedule C, and that income is subject to self-employment tax (15.3% on top of income tax). Two things follow. First, billing everything you actually worked is what your time records protect. Second, those records back up the income figures on your return. The time tracking that helps you get paid is the same tracking that supports the numbers you file.
The time tracker stores per-client rates and totals your hours by client and month (a downloadable PDF timesheet is a Pro feature), and the invoice generator turns those hours into a sent invoice. Once you know your income, the Self Employment Tax Estimator shows what to set aside for quarterly taxes.
Self Employment Toolkit times your work, stores each client's rate, and turns the hours into an invoice. Free to use.
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