InvoiceTools

Home/Guides

How to write an architect invoice

By Fatima Khan, Independent business consultant, MBA

Architectural fees are invoiced against stages rather than hours, which means the invoice is really a claim that a stage is complete.

The free architect invoice template opens with these lines already in place.

The short version

To write an architect invoice, invoice against a named work stage, restate the fee basis, list what the stage produced, charge additional services and site visits separately, show disbursements at cost, and state the fee remaining for the stages ahead.

What goes on an architect invoice

Six things, in the order they belong on the page. The invoice generator opens an architect document with the lines already in place, so most of this is checking rather than typing.

  1. Invoice against a named work stage. Concept design complete, developed design complete. The stage is the deliverable.
  2. Show the fee basis on every invoice. A percentage of construction cost, a fixed stage fee, or hourly, restated each time.
  3. List what the stage produced. Drawings, schedules, the planning submission. It is the evidence behind the claim.
  4. Charge additional services separately. Anything outside the agreed scope is not inside the percentage.
  5. Show disbursements at cost with the item named. Planning fees, printing, surveys and searches are not your fee.
  6. State the fee remaining and the stages ahead. It makes a staged fee feel like a plan rather than a series of demands.

The lines an architect invoice usually carries

The generator opens with these lines when you pick Architect. The figures are placeholders to type over, not a going rate.

LineWhat it coversQtyOpens at
Concept design stageTurn the brief into options, tested against the site and the budget, for you to choose between.1$2,200
Planning drawings and submissionPrepare the drawings and documents for the application and submit them.1$1,800
Building regulations packageThe technical drawings and specification the builder and the inspector both work from.1$1,600
Site visits (per visit)Attend during construction to check the work matches the drawings, with notes after each visit.4$220

Add, rename, reorder or delete any line, and set tax per line where it applies. Priced as they open, that comes to $6,480 before tax.

How to write an architect invoice, step by step

  1. Name the stage that is complete. Open the architect invoice and invoice the stage in your appointment, such as concept design or permit drawings, rather than a month's time.
  2. Restate the fee basis. Fixed fee per stage, or a percentage of the construction cost with the cost figure used. Restated every time, it cannot drift.
  3. List what the stage produced. The drawings, the specification and the application submitted. The client should be able to hold up each thing the invoice names.
  4. Add site visits and extra services apart. Site visits at a per visit rate with the count, and any additional services from a changed brief on their own line.
  5. Show the fee remaining, then send. State what has been invoiced so far and what remains for later stages. Set 30 days and send it when the stage is signed off.

Architect invoice example, filled in

A house extension part way through construction: the design, permit drawings and technical package invoiced, plus four site visits. Each stage is named and the fee position is in the note, so the client always knows what is left to pay.

INVOICE

INV-2026-016
Issued 3 September 2026
Due 30 days from issue
Architect
Your business name
Your address
Your phone and email

Bill to

Ingrid and Paul Sato
5 Quarry Hill, Fernleigh

Project

Rear extension and loft conversion
Appointment dated 3 February 2026

DescriptionQtyRateAmount
Concept design stage1$2,200$2,200
Planning drawings and submission1$1,800$1,800
Building regulations package1$1,600$1,600
Site visits (per visit)4$220$880
Subtotal$6,480
Tax at 10%$648
Total due$7,128
Payment terms. Payable within 30 days of the invoice date. Bank details, or a payment link and QR the client can scan.
Fee position. Fixed fees per stage as set out in the appointment. Stages to date invoiced in full; tender and handover stages remain.

Subtotal $6,480, tax $648, total $7,128. The site visits line shows four visits at $220, separate from the fixed stage fees, so a client who wants more visits can see what each costs. The fee position note turns this invoice into a running account of the whole appointment.

Percentage fees, fixed fees and restating the basis every time

A percentage fee is agreed once and then invoiced five or six times over a year or more, by which point the client frequently no longer remembers how it was calculated.

Restate the basis on every invoice: the total fee, the percentage or fixed sum it derives from, the stage being claimed, the amount claimed and the balance remaining. It costs three lines and removes almost every fee query.

Where the fee is a percentage of construction cost and that cost has moved, address it on the invoice at the time rather than at the end. A client who sees the recalculation once at final account will treat it as a surprise, and they are right to.

Scope, additional services and the client who keeps changing their mind

Design changes after a stage is signed off are the defining commercial problem in architectural practice, because the work is real, the client rarely perceives it as new, and it is invisible in a percentage fee.

Handle it the way the profession does: define additional services in the appointment, then invoice them as their own lines with the instruction that caused them named and dated. Redesign following client instruction to relocate the stair, with the date, is a fact. Extra design work is an opinion.

The same applies to reworking after a planning refusal or a change in the brief. Neither is inside a stage fee, and both need to be raised as an additional service before the work rather than as a line on an invoice afterwards.

Disbursements, expenses and the money that is not your fee

Planning application fees, building control charges, printing, surveys, structural input and travel are pass-through costs, and clients resent them when they arrive folded into a fee.

Show them at cost, itemized, with the payee named where it is a statutory fee. If you apply a handling charge on disbursements, state it as a separate percentage line rather than marking the item up quietly.

Keep them on the invoice they belong to rather than accumulating them for the final claim. A planning fee appearing eight months after submission is a query that costs you more time than the fee is worth.

Hourly, fixed price or per unit: how architects price the work

Architectural fees are a percentage of construction cost, a fixed fee per stage, or hourly for additional services, and most appointments use all three at once. The invoice is a claim that a stage is complete rather than a bill for hours.

ModelWhere it winsWhat it quietly costs you
Percentage of construction costLarger projects where the scope grows with the budgetThe cost moves, so the recalculation has to be raised as it happens, not at the end
Fixed fee per stageSmaller, well-defined projects where the client wants certaintyA client who changes their mind is free to do so unless additional services are defined
HourlyAdditional services, planning resubmissions, unforeseen workIt has to be agreed before the work, or it reads as a bill for your own delay

Restate the fee basis on every invoice: the total, the stage claimed, what it produced, and the balance remaining. An appointment signed a year ago is a document nobody rereads, and three lines on the invoice remove almost every fee query.

Working out what to charge

Architectural fees depend on the project, the procurement route and your experience, so a figure from a web page means nothing. The billable hours calculator shows how many hours each stage can carry, and the percentage calculator checks a percentage fee against the construction cost.

Getting paid once it is sent

Take the first stage fee on appointment and invoice each stage when it is signed off, so no more than one stage of design work is ever unpaid. If the due date passes, the late fee calculator works out what your terms allow and the due date calculator sets the new date.

QuoteDepositInvoiceDue day 30Chase day 37
Quote: A fee proposal against the work stagesDeposit: First stage on appointmentInvoice: Sent the day the work finishesDue day 30: The date printed on the documentChase day 37: Reminder, then your late fee

Five dates decide whether an architect gets paid on time, and four of them are set before the work starts.

Mistakes that cost architects money

  • Invoicing without naming the stage. The client cannot tell what they are being asked to pay for.
  • Fee basis stated only in the appointment. Nobody rereads an appointment letter twelve months in.
  • Additional services never invoiced. A common cause of an unprofitable project in practice.
  • Disbursements marked up silently. A small margin that costs a large amount of trust.
  • No balance remaining shown. Each invoice feels like a new demand rather than part of a plan.

Architect invoice questions

How do I write an architect invoice?

Invoice against a named work stage, restate the fee basis and the balance remaining, list what the stage produced, show additional services separately and itemize disbursements at cost. The generator opens an architect invoice with stage fees, additional services and disbursements already listed.

Should I charge a percentage or a fixed fee?

Percentage fees track the value and complexity of a project and are conventional on larger work. Fixed stage fees give the client certainty and suit smaller, well-defined projects. Either way, restate the basis on every invoice.

How do I invoice for extra work when the client changes the brief?

As an additional service with the instruction named and dated, agreed before the work is done. Redesign following client instruction on a stated date is a fact, where extra design work is only an opinion.

How should I handle planning fees and other disbursements?

At cost, itemized, with the payee named, on the invoice they belong to. If you charge a handling percentage, show it as its own line rather than marking the item up.

What should I do if the construction cost changes?

Address the fee recalculation on the next invoice rather than at final account. A percentage fee that moves once at the end, with no warning, is a dispute waiting to happen.

When should I invoice on a project?

On completion of each work stage, with the stage named and its deliverables listed. That is the convention clients expect and the basis that makes a claim verifiable.

What should an architect invoice include?

Your practice and the client, the project, the stage claimed with deliverables, the fee basis and total, the amount claimed and the balance remaining, additional services, disbursements at cost, the total and your terms.

What does an architect invoice look like?

Like the example on this page: your business and the client at the top, an invoice number, the issue date and a due date 30 days out, then concept design stage, planning drawings and submission, building regulations package and site visits (per visit) as separate lines, each with a quantity, rate and amount. Below them sit the subtotal ($6,480), tax on its own line and the total due ($7,128), then the payment terms and a note on fee position.

Free architect invoice template

The free architect invoice template opens with the lines above already priced, in any of 30 designs made for the trade, and exports a print-ready PDF with nothing saved to a server. Opening a design needs a free account.

Everything on this site, set up for architects

The whole toolkit, with the reason each one matters to architects rather than in general. The four marked links open with architect already selected.

Make the document

Three of these open with architect already selected, so the first line is concept design stage rather than an empty row.

Templates and files a finance team will accept

The same architect lines, in whatever file the client system needs.

Work out the number first

Get it paid inside its terms

Terms of 30 days is the shape this guide assumes. Deposit: first stage on appointment.

Read next

What this is. A guide and template written by Fatima Khan. It is not legal advice. Deposit, cancellation and late fee rules differ by state, so have any wording you rely on checked for your state before it goes on a real document.

Last reviewed by InvoiceTools, Houston, Texas, on 18 September 2026.

The paperwork is the part that gets you paid

An architectural invoice goes to an accounts department, so the terms and the purchase order reference matter more than the wording. A due date beats a phrase, because their system matches on a date, and an invoice with no PO number is not refused, it is simply never approved.

The first four documents you send as a tracked link are free with an account. Everything else on InvoiceTools.com stays free. Generators, calculators and downloads need no account; template designs need a free one.