BOQ vs fee-based billing: when architecture firms should use each

Architecture fees in India fall into two broad buckets:

1. Fee-based — a lump sum or percentage of project cost, paid against design phases.
2. BOQ-linked — billing progresses against a Bill of Quantities, typically for construction supervision.

Pick the wrong one for a given engagement and you'll either leave money on the table or take on operational risk you didn't price in.

Fee-based billing

Classic architecture model. The fee is agreed up front — usually as a percentage of the projected project cost, e.g. 5% of ₹4 crore = ₹20 lakh. The fee is split across design phases:

Phase	Typical %
Concept design	15%
Schematic design	20%
Design development	20%
Construction drawings	25%
Site supervision	20%

You invoice as each phase is signed off. The fee is fixed — cost overruns, scope creep, and revisions eat into your margin unless the contract is crystal-clear about change orders.

When fee-based works

• The scope is well-defined at sign-up.
• The client's decision-maker is senior and decisive.
• You're confident the project will deliver within a predictable timeline.

When it fails

• Residential projects where the client keeps changing their mind.
• Developer-led projects with multiple stakeholders and conflicting preferences.
• Anything where "scope" is a moving target.

BOQ-linked billing

Common for construction supervision, detail drawings against a contractor's BOQ, or consulting engineer scopes. You bill as units are designed, detailed, or supervised — e.g. per drawing, per item, per site visit.

Cash flow matches effort. If the scope expands, your bill expands. If it contracts, your bill contracts.

When BOQ works

• Scope is fluid or may grow.
• You're a consultant, not the lead architect.
• The project will have many drawings / many site visits / many material submittals and you want to bill per unit.

When it fails

• Clients who wanted "a fixed price" and feel nickel-and-dimed.
• Scopes where most of the value is in up-front design, not downstream documentation.

The hybrid

Most modern Indian architecture contracts combine both: a lump-sum design fee for phases 1–4 (concept through CDs), and a BOQ-linked or hourly rate for site supervision in phase 5. Blueprint handles both cleanly — your project management uses milestones for the phases; your billing module issues RA bills against each, with the ability to add line items for hourly or unit-based work.

The operational overhead

Fee-based is simpler to run: five invoices a project. BOQ is heavier: you need to track units delivered, which typically means timesheet integration. Blueprint's time tracking module converts approved billable entries into invoices in one click — so BOQ-style billing stops being the operational tax it used to be.

Further reading

• Architecture practice management
• Time tracking → invoice