Architecture billing software turns tracked hours, phase progress, fees, and expenses into accurate invoices, then sends them, chases payment, and records what's been collected.
Done well, it shortens the gap between finishing work and getting paid and closes the leaks where billable time goes uninvoiced.
This guide covers 7 options for architecture firms, covering pricing, customer sentiment, and the criteria that should shape your shortlist.
Milient Project Flow is a project management software built for architecture and engineering practices. It consolidates the entire flow from offer to invoice, so billing data is never re-entered. Fees, budgets, hours, and invoiced percentages live on the same project record.
These three Project Flow features do the heavy lifting for billing accuracy.
You can create invoices directly from the information registered on each project. Logged hours, fees, and phase progress populate the invoice, and invoice splitting handles shared fees across clients or companies.
Automatic payment status tracking and reminders chase overdue invoices for you. Enterprise firms can also run multicompany internal invoicing across offices.
The Offer Builder lets you create quotes inside the platform. Once accepted, the quote becomes the project structure with a single click. Fees, phases, and budgets carry over intact.
This closes the most common revenue leak in architecture billing: scope agreed in the proposal that never reaches the invoice.
Time tracking is built for fast registration, so architects actually log hours on time. You can then see hours and costs against the fee per phase, and flag overruns before they escalate.
Because approved hours sit on the project record, billable time converts to invoice lines without exports.
"Very user-friendly. The display is easy to understand, and I can change my operating language. I like the visualisation and the blog, which helps me and my colleagues communicate on our project progress." — Verified user, Capterra
"Project Flow allowed me to stop relying on endless Excel spreadsheets. Updating the billable forecast is the feature that has saved me a huge amount of time. The support team is very responsive." — Verified user, Capterra
"The ease of use — it's intuitive enough." — Verified user, Capterra
Monograph is a firm management platform built for US-based architecture and engineering firms with roughly 5 to 50 people. Its billing model mirrors how American studios structure contracts, with phases, mixed fee types, and consultant pass-throughs.
“The integrations with QuickBooks Online has allowed our principals to get a comprehensive visual picture of the firm's financial performance without the need to switch between programs,” shares Jason P on G2.
“The fact that I need to subscribe to other tools to make it complete. If Monograph could offer an all-in-one suite (from estimate to billing), I would highly recommend it,” says Marc G on Capterra.
BQE Core is an architecture firm management software that puts accounts payable, accounts receivable, general ledger, and bank reconciliation inside the same platform as project billing.
“Recording expenses using the platform is much easier. BQR CORE also enables us to quickly track and control our expenses in real-time.” Gideon B on Capterra.
“From the beginning, we found that BQE was very much geared to the US market, which made it tricky when it came to setting up taxation here in Canada. This is one of the reasons we keep our accounting software separate and sync our projects and billing at the end of the month.” Carmel C on Capterra.
Deltek Ajera is a project management and accounting application for small architecture and engineering firms, and it sits within the wider Deltek ERP family.
Its pitch is longevity: full project accounting that firms grow into rather than out of.
“Full project management integrated with timesheets, expense reports, accounts payable, etc. Ease of writing and using dashboards and widgets,” shares this verified G2 reviewer.
“The expense reporting is slightly clunky, and although other companies and software are able to effectively submit photos and expenses through mobile apps, the Ajera app could use an overhaul in this regard.” Schuyler R.
Sage Intacct is enterprise financial management software rather than a practice management platform.
Its construction edition handles the billing complexity that large, multi-office AEC groups face. It supports fixed price, time and materials, and cost-plus contracts, manages AIA billing, and consolidates multi-entity financials in minutes.
“What I like most about Sage Intacct is its powerful, multi-dimensional general ledger. It provides deep financial visibility and makes reporting more streamlined, without requiring an overly complex chart of accounts.” Kaangeyan P.
“The user interface, while functional, maintains a very rigid and austere look that can intimidate non-financial team members. Furthermore, any custom report development outside of standard templates requires advanced technical skills, making the tool quite dependent on expert support. Poulard F.
Scoro is a professional services automation platform for consultancies, agencies, IT firms, and architecture companies. ItWith Scoro, confirmed quotes convert straight into invoices, partial invoicing bills as work progresses, and retainer invoices generate automatically each period.
However, there is no RIBA-stage structure, AIA billing, or drawing-tool connectivity, so AEC workflows need manual configuration.
In Autodesk Forma Build, every subscription includes project management, quality management, safety management, and cost management, plus access to Autodesk Docs.
The Cost Management module handles budgets, contracts, payment applications, change orders, and project-level cash flow analysis, with cost data syncing to accounting systems such as Sage, Viewpoint, and JD Edwards.
Pricing runs to around $117 per user/month billed annually, with unlimited-user pricing on custom quote. Still, there is no timesheet-based invoicing, phase fee billing, or retainer handling for professional services.
Architecture firm billings have now stayed below the growth threshold since January 2023, with the AIA/Deltek Architecture Billings Index falling to 48.3 in April 2026. By May, the index had dropped further to 44.5.
When fee income is contracting across the profession, unbilled hours and slow collections stop being admin problems and start deciding margins.
The five criteria below separate the platforms that protect revenue from those that leak it.
Your software should support how you actually bill: progress billing, milestones, T&M, retainers, and change management.
UK firms need RIBA-style staged invoicing; US firms need AIA formats. Anything forcing a workaround here leaks revenue every month, so test it with a real contract before buying.
Milient Project Flow's fees solver calculates base fees, discounts, and production totals per phase, so complex fee agreements bill without spreadsheet arithmetic.
Billing errors come from re-keyed data, and every correction delays payment. The invoice should pull directly from logged hours, role rates, and signed fee totals, with job costing sitting on the same record.
In Milient Project Flow, hourly rates are set per project role, so an architect's and an intern's hours are priced correctly on the invoice without manual adjustment.
A budget overrun discovered at invoicing is a write-off; discovered in week two, it's a staffing decision.
Look for live views of budget consumed against invoiced percentage, plus forecasting of billable work still to come. With clients approving smaller projects and stalling decisions, that early warning is what protects the fees you've already won.
Milient Project Flow's billable forecast shows expected invoicing ahead of time.
Timesheets fail when entry is slow, and unlogged hours never reach an invoice.
Look for fast registration, role rates, and approvals with audit trails, then judge tools honestly against our comparison of the best time tracking software for architects.
Milient Project Flow separates billable from non-billable allocation at role level, so utilisation stays honest even in crunch periods.
Map seats, add-on modules, implementation, and migration support, then weigh that against the unbilled hours and slow collections the platform eliminates.
A £20 seat with invoicing included often beats a cheaper seat needing three paid modules. Also, check accounting integrations against your current ledger, because double entry between systems burns the admin hours you're trying to recover.
Milient Project Flow includes invoicing, payment reminders, and support in every plan.
Most billing software shortlists fail the same way: they rank general project management strength, then treat invoicing as a footnote. We selected these seven the opposite way, testing each against the mistakes that cost firms money after purchase:
1/4 of firm leaders expect their billings to fall further in the third quarter of 2026. You can prevent slow invoicing from making that worse by picking the platform that bills the moment work is done, not at month-end.
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