Invoicing that's the most flexible in the industry.

Build customizable invoices from live project data for accuracy
every time, sync with QuickBooks Online, and get paid faster with FactorPay.

Factor’s impact on A&E firms is clear.

All metrics are based on self-reported customer data.

0hrs

saved every invoicing cycle.

000%

user adoption.

<1hr

to bill 30 projects.

1/00th

the price of Deltek.

Customizable invoice templates with AIA best practices built in. 

Build invoices the way you bill: fixed fee, hourly, milestone, or percent complete. With unlimited formatting options and the ability to add details like subconsultant fees, retainers, and aging summaries, it’s flexible enough for every client requirement. 

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Two-way QBO sync + online payments for cash that keeps flowing. 

Our two-way, real-time QuickBooks Online integration (the only one in the industry) keeps invoices, bills, and payments synced across systems, so double entry disappears and accuracy improves. Plus, with FactorPay, clients can pay online in seconds, so cash hits sooner.

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Accurate invoices in minutes, every time. 

Bill from a single source of truth. Invoicing pulls live project data so what you bill always matches the work. See budgets, WIP, approved time, expenses, and subconsultant bills in one place, then review, approve, and send without ever switching tools. 

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We do the heavy lifting so you can bill faster.

During onboarding, our specialists set up and design your invoice templates for accuracy, compliance, and automation. Your team finishes with polished templates, full training, and role-based permissions, plus free template requests anytime (at no charge). 

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"I would recommend Factor for anyone in the industry.”

In one quick call, we’ll show you a simpler way to run projects and get paid faster. 

“I've worked with software platforms for 20+ years, and Factor has been my best experience of having a platform that will listen to you and is just as invested in us as we are in us.”

Betsy Koch

Operations manager

Frequently asked questions about invoicing

What should an A&E invoice include?
How do fixed fee, T&M, and percent complete invoicing differ?
How often should A&E firms invoice?
What is retainage on an invoice?
How should we bill reimbursable expenses?