How Do Contractors Track Hours for Invoicing?

When you're self-employed, nobody tracks your hours for you. If you don't record the time, you can't bill it. Contractors who invoice from memory almost always undercharge, because the small stuff (a quick call, an extra trip, 20 minutes of cleanup) never makes it onto the invoice.

The three things a contractor's time record needs

A good record makes invoicing fast and makes your invoices hard to argue with. It needs:

• Accurate start and end times for each block of work, minus breaks.
• The client or job each block belongs to, especially if you bill different clients at different rates.
• A short note about what you did, so the client can see what they're paying for.

If you juggle several clients, read how to track hours across different jobs and projects.

How most contractors lose billable time

• Rounding down to be safe. Guessing "about 3 hours" when it was 3 hours and 40 minutes.
• Forgetting short tasks. Calls, emails and supply runs that never get written down.
• Rebuilding the week on Friday. Trying to remember Monday's hours four days later.
• Messy spreadsheets. Formula errors and missing rows that quietly shrink totals.

We break down the bigger picture in what timesheet mistakes are costing you.

A simple invoicing workflow

Clock in when you start, clock out when you stop

Timing work live is the only way to capture the small stuff. Log breaks so they don't get billed.

Keep each client separate

Give each client or job its own rate so totals are calculated correctly.

Export your hours at the end of the billing period

Pull a clean PDF or CSV of the period's hours and earnings, then attach it to your invoice or copy the totals into your invoicing tool.

How Hours Tracker Time Clock helps contractors

• Unlimited jobs and rates. Track every client in one place, each at its own rate.
• Home-screen widget. Start and stop the clock without opening the app, which makes timing short tasks painless.
• Notes on your calendar. Add what you did to each day so your invoice tells the story.
• One-tap PDF and CSV export. A professional record of hours and earnings, ready to send.
• Cloud backup. Switch phones and your billing history comes with you.

For the client-facing side, see our guide on how to bill clients accurately for hours.

Bill for every hour you work

Download Hours Tracker Time Clock on the App Store or Google Play. If you're still on paper, here's why it's worth switching from paper timesheets.