Time Tracking to Invoice Calculator
Turn tracked hours and minutes at your hourly rate into a clean invoice total, with optional tax and rounding to the nearest billing increment.
How it works
Billed minutes = ceil(tracked minutes ÷ increment) × increment · Subtotal = billed hours × rate · Total = subtotal × (1 + tax%)
Time trackers log to the second, but most agencies and freelancers bill in fixed increments — a tenth of an hour (6 min) or a quarter hour (15 min) are common. Rounding up each entry to the next increment is standard practice and is what turns raw tracked time into a defensible invoice line. Choosing a smaller increment is fairer to the client; a larger one is simpler but can noticeably inflate short tasks.
Worked example
You logged 12 h 30 m — that is 750 minutes. Rounded up to the nearest 15 minutes it stays 750 min = 12.50 h. At $85/h the subtotal is $1,062.50, and with no tax the invoice total is $1,062.50.
Frequently asked questions
Why round billable time up instead of to the nearest increment?
Rounding up is the conventional professional-services rule: any part of an increment consumes that increment. If you prefer nearest-increment rounding, use the "Exact" option and round the final figure yourself.
Should the tax apply to labor?
It depends on your jurisdiction — many places do not tax professional services, while some do. Leave tax at 0% if labor is exempt where you invoice, or enter your local rate if it applies.
How do 6-minute increments work?
Six minutes is one tenth of an hour, so time is billed in 0.1-hour steps. It is the most common increment in legal and consulting billing because it keeps rounding small while staying easy to total.
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Educational estimate, not financial advice.