An architect's only intellectual asset is their design time. Yet, many of the brightest firms treat their project accounting as an afterthought. If you aren't tracking every billable minute, you're likely under-billing your clients by 15% to 20% based on industry studies in 2026.
In this guide, we break down why project accounting is your most important bookkeeping task and how to do it without the headache.
Even if you charge a flat $50k fee for a project, you must still track your hours. Why? To determine your Effective Hourly Rate.
Without tracking, both look equally successful. With tracking, you realize Project B was a disaster and you need to charge more for that specific type of design next time.
For most solo architects, Xero Projects is the perfect internal tool. It allows you to create a project, assign estimated hours, and then track time directly against it. At the end of the month, one click turns those hours into a professional invoice with full task breakdowns.
đź’ˇ Pro Tip: Set up a "Daily Cap" for your hours. If you're working 10 hours a day but only billing 4, you're hitting "Scope Creep" in your design. This is often caused by administrative work that isn't being accounted for in your base rate.
The 15-minute phone call with the contractor. The 10-minute check of the drafting table. These "micro-sessions" represent thousands of dollars in lost annual revenue for architects. Use a mobile app that syncs with your desktop (like Toggl Track) to capture these fragments as they happen.
Your bookkeeping should also help you understand your Utilization Rate. If you work 40 hours a week but only 20 are billable to the project, where are the other 20 going? If it's business development, that's high-value. If it's manual bookkeeping or chasing invoices, that's low-value work that can be automated.
Our accountants help architectural firms set up robust project-tracking systems that flow directly into Xero. Stop losing billable hours today.
Talk to an Architect Bookkeeper