Billable Hours: What Counts, How to Track Them, and the Rate Math

Billable hours are the hours you can charge a client for: time spent on work the client asked for, under an agreement that says they pay for it. Everything else you do to run the business (sales calls, invoicing, bookkeeping, learning a new tool) is non-billable. You still have to do it, but no client pays for it directly.

Most freelancers who set their rate by dividing a salary by 2,080 hours find out the hard way that a 40-hour week produces nowhere near 40 billable hours. This guide covers what counts as billable, how to measure the gap, and how to price for the hours you'll really bill. The mechanics of putting hours on an invoice (line items, rounding, timesheets) are in the separate guide on how to invoice for hours worked.

Billable vs non-billable: the default split

Your contract decides the edge cases, but this is the usual starting point:

| Usually billable | Usually non-billable | Depends on the contract | |---|---|---| | Doing the actual project work | Finding and pitching new clients | Travel time | | Client meetings and calls about the project | Writing proposals and quotes | Research before starting | | Revisions within the agreed scope | Invoicing and chasing payment | Onboarding / learning the client's tools | | Project-specific research | Bookkeeping, taxes, admin | Emails and quick questions | | Project management for this client | General skill-building | Fixing your own mistakes | | Preparing deliverables and handover | Internal tooling, portfolio work | Work outside the agreed scope |

Three of the gray-zone items cause most of the arguments:

• Travel. Common approaches are full rate, half rate, or not billed with expenses reimbursed. Pick one and write it into the agreement before the first trip.
• Emails and quick questions. Ten five-minute questions a day add up to most of an hour. A stated minimum increment ("calls and emails billed at 15 minutes minimum") settles it. See the rounding section of the hourly invoicing guide.
• Out-of-scope work. Billable, but only if you flag it before doing it. Hours that appear on the invoice without warning get disputed. Scope changes belong in a written change order, just like on a time-and-materials project.

Fixing your own mistakes is the item freelancers most often bill when they shouldn't. If the defect was yours, the fix is usually on you, and billing for it costs more in trust than it earns.

Utilization rate: the number that sets your price

Your utilization rate is the share of your working hours that are billable:

utilization rate = billable hours ÷ total working hours

If you work 40 hours a week and bill 24, your utilization is 60%. For freelancers and small agencies, somewhere between 50% and 75% is typical. Lawyers and accountants at large firms are often held to higher targets, but they have support staff doing the sales and admin.

Measure yours before you trust any number from an article, including this one. Track all your working time for four weeks, tag each entry billable or non-billable, and divide. The result is often lower than people expect.

Setting a rate from billable hours

Once you know your utilization, the rate math is straightforward. Start from what the business needs to bring in, then divide by the hours you'll actually bill.

A worked example:

Working weeks per year      52 − 4 vacation − 1 holidays − 1 sick   = 46
Working hours per year      46 × 40                                  = 1,840
Utilization                                                           60%
Billable hours per year     1,840 × 0.60                             = 1,104

Target take-home (before tax)                                  $75,000
Business costs (software, equipment, insurance, accountant)    $9,000
Buffer for gaps between clients (10%)                          $8,400
Revenue needed                                                 $92,400

Minimum hourly rate         $92,400 ÷ 1,104                     ≈ $84/hr

Compare that with the naive version: $75,000 ÷ 2,080 hours = $36/hour. The naive rate would leave this freelancer with well under half the income they planned for.

If $84 is above what your market pays, your options are to raise utilization (less unpaid admin, fewer unpaid pitches), cut costs, or move some work to fixed-fee or milestone pricing, where your income depends on the value delivered rather than on the hours.

Tracking billable hours

The only tracking method that works is the one you use every day. Some options:

• A timer app (Toggl, Clockify, Harvest). Start it when you start a task, tag the client and project. Best accuracy, requires the habit.
• Calendar blocking. Plan the day in blocks, then correct the blocks to what actually happened at the end of the day. Good enough for many freelancers.
• A daily log. A spreadsheet row per task: date, client, task, duration, billable yes/no. Low-tech, works, easy to hand to a client.

Whatever you use, three rules keep the numbers defensible:

1. Record time the same day. Reconstructing a week from memory on Friday produces round numbers that look invented, because they are.
2. Write what you did, not just how long. "2.5h — checkout page layout, mobile fixes" survives a client question. "2.5h — dev work" doesn't.
3. Log non-billable time too. You can't calculate utilization from billable hours alone, and the non-billable log shows you where the week actually goes.

From billable hours to money in the bank

Billed hours and collected hours aren't the same number either. If you logged 100 billable hours, invoiced 90 after write-downs, and collected on 85, your realization rate is 85%. The gap comes from hours you decided not to bill, discounts, and invoices that never got paid.

The fixes are on the invoicing side. Invoice on a regular cycle (weekly or every two weeks for hourly work), attach the timesheet, and keep an eye on anything outstanding. An invoice for 18 hours with task-level detail gets approved; one line reading "Development — 18 hours" gets questioned.

A free invoice generator handles the hours × rate math and the layout, so turning a week's log into a clean invoice takes a couple of minutes.

FAQ

What are billable hours?

Hours spent on work a client has agreed to pay for, charged at your hourly rate. Time spent running your own business, such as sales, invoicing, and admin, is non-billable.

What is a good billable utilization rate for a freelancer?

Commonly 50–75%. Below 50%, too much of your week goes to unpaid work, usually sales or admin. Above 75% is possible for a while with long-term clients, but leaves little time for finding the next ones.

How many billable hours are in a year?

For a full-time freelancer, typically 1,000–1,400. Starting from 2,080 hours (40 × 52), subtract vacation, holidays, and sick days, then apply your utilization rate. At 46 working weeks and 60% utilization, the answer is about 1,100.

Is travel time billable?

Only if your agreement says so. Common arrangements are full rate, half rate, or no charge for the time with travel expenses reimbursed. Agree on it before the first trip.

Are emails and phone calls billable?

Project-related calls and emails are usually billable. Many freelancers set a minimum increment, such as 15 minutes, so that frequent short requests don't turn into unpaid work. State the policy in your contract and on the invoice.

How do I show billable hours on an invoice?

As line items of hours × rate, grouped by task or week, with a timesheet attached for longer periods. The full format, including rounding rules, is in how to invoice for hours worked.