Design fee vs supervision fee: the second fee most practices under-bill
Across South Asia and the Gulf the architect usually supervises what they designed. Almost no practice management software was written for that, and the supervision fee pays the price.
In North America and much of Western Europe, the architect designs and a separate construction manager runs the site. Most established practice-management software encodes that assumption in its data model, because that is the market it was written for.
Across South Asia, the Gulf and much of the rest of the world, the same practice does both. That is not an edge case — it is the normal shape of the profession for most architects alive. And it means the practice is running two businesses on one project, with two fees that behave nothing alike.
How the two fees differ
| Design fee | Supervision fee | |
|---|---|---|
| Shape | Staged, front-loaded, finite | Monthly or per-visit, open-ended |
| What ends it | A deliverable and an approval | Practical completion — whenever that arrives |
| Main risk | Scope creep during design | Programme extension you do not control |
| Typical failure | Stage closes and nobody invoices | Project stalls for four months and nobody bills for the site visits that still happened |
| Who decides the duration | Largely you | Entirely the contractor |
That last row is the one that costs money. A design fee priced for nine months and delivered in nine months is a fair bet. A supervision fee priced for nine months on a project that runs twenty is not a bet, it is a subsidy — and it is invisible unless the two fees are tracked separately.
What to write into the appointment
- The supervision fee stated separately, with its own basis — monthly, per visit, or a percentage with a stated assumed duration
- A defined construction period, and what happens to the fee if it is exceeded
- What a site visit includes, and what constitutes an additional attendance
- Whether reporting is included, and at what frequency
- The trigger for the final instalment: practical completion, or the defects certificate
The "assumed duration" clause is the single highest-value sentence in this article. Without it, an extension of time granted to a contractor silently becomes an extension of your unpaid attendance.
Why the software matters here
A system that models one fee per project forces you to choose: track design and supervision as one number and lose the distinction, or split the project in two and lose the connection between the drawings and the site. Most practices choose the first, and the supervision fee quietly stops being managed.
The accounting half of this problem — an architecture practice with two fee streams that a general ledger cannot express — is covered in why generic accounting mishandles a practice.
Ofivio holds design and supervision as two fees on one project — the drawings and the site stay connected, and both fees stay visible.
See how →How to structure architect fees by stage — and get paid on time
The stage fee is the oldest instrument in architecture and the most casually applied. Most practices know the percentages and almost none of them can say what actually triggers the invoice.
DesignPercentage, lump sum or hourly — how to price architectural work
Most practices pick a fee model once and apply it forever. The model is a risk allocation, and the right allocation changes from project to project.
FinanceWhy generic accounting software mishandles an architecture practice
The root problem is the dual fee. Software that assumes a single revenue stream forces you to choose which half of your practice gets measured properly.