Software work spans hourly tickets, fixed-price sprints, and recurring maintenance retainers. This developer invoice template handles all three, lets you reference the repo or ticket in each line, and keeps infrastructure passthrough costs separate from your labor.
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These are the line items developer businesses bill most often. Add the ones that apply to your job — the generator totals them automatically.
Tie milestone payments to merged-and-deployed work, not just "code written", and bill maintenance retainers at the start of each month.
Custom software development is exempt from sales tax in many states, but prewritten/SaaS resale can be taxable — keep passthrough costs on their own lines.
Put the ticket, PR, or repo name in each line description — "Auth refactor (PR #482)" — so the client can map the charge to delivered work.
If you front infrastructure or SaaS costs on the client's behalf, bill them as a separate passthrough line so your labor and their costs are cleanly distinguished.
Invoice a fixed monthly retainer in advance, state the included hours, and bill any overage on the following invoice.
Note in the terms when code ownership transfers — typically on final payment — so there is no ambiguity over who owns the deliverable.