Time And Materials Invoice Template
When you bill for hours worked and materials used, your invoice must show the workings. Transparent detail is what gets a T&M invoice approved.
What's included
- Itemise hours, rates and materials so the total is verifiable
- Reference the dates and tasks behind each time entry
- Show materials at the agreed mark-up or cost
- Pre-empt queries by making the workings transparent
- Tie the invoice back to the agreed rates and scope
6 min read
Why this template matters
Fixed-price invoices hide the workings; time-and-materials invoices must show them. When you bill for hours worked and materials used, the customer cannot sanity-check a single bottom-line figure — they need to see the hours, the rates and the materials that built it. An itemised T&M invoice that lays out the detail is approved; a lump sum labelled 'works as discussed' is queried.
Transparency is not just courtesy, it is self-protection. A detailed breakdown lets the customer reconcile against what they expected and what was agreed, so the conversation is about the work, not about trust. The more clearly your invoice shows how the total was reached, the faster it clears approval.
The template
TAX INVOICE — TIME & MATERIALS [Your trading name] ABN: [11 22 333 444] Bill to: [Customer name] Invoice number: INV-0312-TM Issue date: 14 March 2026 Period: 1 Mar – 13 Mar 2026 Job / PO ref: PO-0501 ------------------------------------------------------------ LABOUR Date Task Hours Rate Amount ------------------------------------------------------------ 03 Mar [Task description] 4.0 120.00 480.00 07 Mar [Task description] 6.0 120.00 720.00 11 Mar [Task description] 3.5 120.00 420.00 ------------------------------------------------------------ Labour subtotal (13.5 hrs) 1,620.00 MATERIALS Item Qty Unit Amount ------------------------------------------------------------ [Material / part] 2 85.00 170.00 [Material / part] 1 110.00 110.00 ------------------------------------------------------------ Materials subtotal 280.00 ------------------------------------------------------------ Subtotal (ex GST) 1,900.00 GST (10%) 190.00 TOTAL (inc GST) 2,090.00 ------------------------------------------------------------ Rates per agreement / quote Q-0042. Pay by EFT: BSB 000-000 Acc 00000000 Ref: INV-0312-TM
How to use it
Split the invoice into labour and materials, and within labour show the date, task and hours for each entry. Dated, described time entries are what let a customer match your invoice to the work they saw happening — vague 'consulting, 13.5 hrs' invites the very query the detail is meant to avoid. State the rate explicitly and reference where it was agreed.
For materials, show them at the basis you agreed — at cost, or at cost plus a stated mark-up — and itemise rather than bundle. Reference the quote or job number so the rates tie back to something accepted. Where the work runs against a purchase order, quote the PO number so it routes through the customer's approval cleanly.
Controlling T&M disputes before they start
The two things that derail a T&M invoice are surprise totals and unclear rates. Pre-empt both: agree the hourly rate and the materials basis in writing before the work, and if a job is heading well past expectations, flag it before you bill, not in the invoice. A customer warned of a growing bill argues far less than one ambushed by it.
Keep contemporaneous records — a simple timesheet and materials log as you go — so your invoice is built from evidence, not reconstructed from memory. If the customer queries a line, you can point to the record behind it. Transparent process plus transparent invoice is what makes time-and-materials billing sustainable rather than a monthly negotiation.
Tips
- Split labour and materials, and date and describe every time entry.
- State rates explicitly and reference where they were agreed.
- Show materials at the agreed basis — at cost or cost plus stated mark-up.
- Flag a job running over before you bill, and keep records as you go.
FAQ
How much detail does a T&M invoice need?
Enough that the customer can verify the total: dated, described time entries with hours and rate, and itemised materials. A single lump sum on a T&M job almost always triggers a query.
Should materials carry a mark-up?
That is for your agreement — at cost, or cost plus a stated percentage. Whichever you use, agree it in writing first and show materials itemised so the basis is transparent.
How do I avoid disputes over hours?
Agree the rate up front, keep a contemporaneous timesheet, describe each entry, and warn the customer early if the job is heading over expectations. Surprise totals cause most T&M disputes.
Templates are a head start — not legal advice
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