How to Invoice for Hourly Work: Time Tracking to Getting Paid
Hourly billing sounds simple — track time, multiply by rate, send invoice. In practice, it's where most freelancers run into scope creep, disputes, and late payment. Here's how to do it right.
Hourly Billing Challenges
Proving your hours
Clients can't see inside your computer. Without a time tracking record, any hour can be questioned. Always track — even if the client never asks.
Clients questioning hours
'Did this really take 8 hours?' If you don't have a detailed log, you're defending yourself from memory. With a log, you share the breakdown and move on.
Scope creep
Extra requests mid-project that weren't in the original brief. If untracked, these hours disappear. If tracked but unbilled, you lose money. Always log everything.
Rate changes
Your rate increases over time. Always confirm the rate in writing before starting work, and state it clearly on every invoice.
Time Tracking Tools for Hourly Billing
| Tool | Free tier | Best for |
|---|---|---|
| Toggl Track | Unlimited (basic) | Simple start/stop timer, great reports |
| Clockify | Unlimited users | Team time tracking, most generous free tier |
| Harvest | 1 user, 2 projects | Time + invoice integration |
| Manual timesheet | Free | Old school but works — spreadsheet with date, task, hours |
What to Include on an Hourly Invoice
A good hourly invoice leaves no room for questions. Include:
- ✓Date range of work covered (e.g. 'May 1–15, 2026')
- ✓Detailed time log: date, task description, hours per entry
- ✓Hourly rate (e.g. €80/hr)
- ✓Subtotal per work category if you do multiple types (design, development, consulting)
- ✓Total hours × rate = invoice total
- ✓Any expenses or travel charges as separate line items
- ✓Payment terms and bank details
5 Hourly Invoice Templates
Simple Hourly
One line: [X hours] × [€rate/hr] = [total]. Best for small, one-off projects with a single type of work.
Web consultation — 4 hours × €100/hr = €400
Detailed Timesheet Style
Every work session listed: date, task, hours. Ideal for longer projects where you want full transparency.
May 1 — Homepage wireframes — 3h May 3 — Client review meeting — 1h May 5 — Revisions — 2h Total: 6h × €80 = €480
Project Hours Summary
Grouped by work phase or deliverable. Good for phased projects.
Discovery & research: 5h × €90 = €450 Design: 8h × €90 = €720 Revisions: 2h × €90 = €180 Total: €1,350
Weekly Billing
A new invoice each week for ongoing retainer clients. Week summary + breakdown.
Week of May 12–16: 20 hours × €75/hr = €1,500
With Travel + Expenses
Hourly work + reimbursable expenses as separate line items.
Design work: 6h × €80 = €480 Travel (NL → BE, car): €65 Accommodation: €120 Total: €665
How to Handle Timesheet Disputes
Disputes happen. Here's how to prevent and resolve them:
- 1Keep time tracking records — export from your time tracker as backup
- 2Communicate estimates upfront in writing — 'This phase will take approximately 8-10 hours'
- 3Get approval for hours that will exceed the estimate before exceeding them
- 4For scope changes: send a change order email and wait for written approval
- 5If disputed: share the detailed time log calmly and offer to walk through it
Free Hourly Invoice Template
Create a professional hourly invoice in 60 seconds with our free invoice template tool. Add your hours, rate, and details — download as PDF instantly.
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Try Chaser Free →See pricing →Frequently Asked Questions
How do you invoice for hourly work?
List the date range covered, a description of work done, total hours, your hourly rate, and the total amount. Include a detailed time log if the project was long or complex.
Should I send an hourly invoice weekly or monthly?
For ongoing work: monthly is standard. For large projects: consider weekly or at milestones to keep cash flowing. Whatever you choose, tell the client upfront.
What if a client disputes my hours?
Share your detailed time log. If you tracked time properly, you have an itemized record per day. Stay calm, explain each entry, and offer to discuss. Most disputes resolve quickly with evidence.
Do I need to include a timesheet with my invoice?
Not legally required, but strongly recommended for hourly billing. A detailed breakdown builds trust and prevents disputes before they happen.