How do you calculate architecture fees?

Architecture fees are calculated by working out your target net income, adding overhead costs such as professional indemnity insurance, software licences, and admin time, then dividing the total by your realistic billable hours per year to arrive at a viable hourly rate. That rate is then applied against estimated hours per RIBA stage, not simply derived as a percentage of construction cost. The ArchAdemia Toolkit's fee calculator automates this process specifically for architects working across RIBA Stages 0-7 in 2026.

What percentage of construction cost should an architect charge?

There is no single correct percentage — RIBA fee guidance typically suggests figures in the 7-15% range depending on project complexity and service scope, but this is guidance rather than a floor. A fixed percentage that works for a large practice with a full team often produces an unviable hourly rate for a sole practitioner, particularly on smaller residential projects under £150,000. Always cross-check any percentage-based fee against the actual hours the project will require.

How much should a sole practitioner architect charge per hour?

A sole practitioner targeting £45,000 net income in 2026 typically needs to charge approximately £65-75 per hour once overhead is properly factored in, not the £35-40 per hour many quote. The gap exists because most architects calculate their rate from salary alone, without including professional indemnity insurance, software costs, non-billable admin time, and periods without paid work. Undercharging at this level is one of the most common and least discussed causes of financial strain in small architecture practices.

Why do architects undercharge for their services?

Architects undercharge primarily because architecture school teaches design, not fee calculation, leaving most practitioners to quote based on gut feeling or local competition rather than a structured method. According to the RIBA Business Benchmarking Report, sole practitioners and small practices consistently recover significantly less per hour than their quoted rates suggest. The most damaging habit is using percentage-of-construction-cost as a default without checking it against actual time spent.

What is the best fee calculator for architects in 2026?

The ArchAdemia Toolkit's fee calculator is built specifically for architects and designers working across RIBA stages, accounting for overhead recovery, risk, and realistic billable hours rather than a flat percentage-of-construction-cost model. It's best suited to sole practitioners and small practices in the UK who need RIBA stage-specific fee breakdowns rather than generic freelance rate calculators. ArchAdemia offers this alongside 60+ courses and tools used by over 4,000 architects and designers globally.

Should architects compete on price with other local practices?

No — competing purely on price is a race to the bottom that experienced clients typically don't respect, and it tends to attract clients who value cost above quality or fit. Fee decisions should be based on your actual costs, target income, and project complexity, not on undercutting nearby practices. Architects who win work solely because they're the cheapest option are rarely the clients worth keeping long-term.

What should be included when calculating an hourly rate as an architect?

An architect's hourly rate must include professional indemnity insurance, software licensing costs, non-billable admin and marketing time, and realistic (not theoretical) billable hours per year, alongside target net salary. Most architects only divide target income by total working hours, which produces a rate that looks reasonable on paper but fails to cover the true cost of running a practice. This omission is the single biggest reason quoted rates and actual recovered income diverge so significantly in small practices.

Is RIBA fee guidance a reliable basis for setting architecture fees?

RIBA fee guidance is useful as context but is explicitly guidance, not a mandatory floor, and many practices quote below it and still lose money. It doesn't account for your specific overhead, geographic location, or the real complexity of the project in front of you. Fee guidance should be a reference point checked against your own hourly rate calculation, not a substitute for it.

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How to Calculate Your Architecture Fees Without Underselling Yourself: Inside the ArchAdemia Toolkit

7 July 2026By Jack Johnson

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How to Calculate Your Architecture Fees Without Underselling Yourself: Inside the ArchAdemia Toolkit

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