An interior design studio sells design. It loses money on procurement and revisions.
That mismatch is the central operational problem in the sector. The creative work is what the business is known for and what it charges for. The margin is decided by whether the right items were ordered at the right price and arrived on time, and by how many rounds of changes were absorbed without being billed.
Both are tracking problems. Both are usually handled in chat threads, email and someone's memory.
Why studios are structurally different
Design work has a shape that most business software does not anticipate:
Projects run for months with irregular activity — intense periods, then waiting on approvals or deliveries.
Money moves in stages, tied to milestones rather than to a single transaction.
Procurement is per project, not stock held. Items are bought for a specific client, from many suppliers, with long and unreliable lead times.
Scope changes constantly, and much of the change is verbal.
That last one is where most of the unbilled work originates, and it is a records problem before it is a commercial one.
Procurement is the actual operational load
For most studios, procurement consumes more administrative time than design and receives less structure.
The specific difficulties:
Many suppliers, one project. A single room may involve a dozen suppliers with different lead times, payment terms and reliability. Coordinating them is the job.
Lead times decide the schedule. Installation cannot start until items arrive. A supplier slipping two weeks moves everything, including the payment milestone.
Items are project-specific. These are not stock. They are bought for a client, and if the client changes their mind after ordering, someone absorbs it.
Deposits and part-payments. Money goes out before it comes in, across many suppliers, on different schedules.
What needs tracking, per item: what was specified, what was quoted, what was ordered, what was paid, expected arrival, actual arrival, and against which project and room. Where this lives in email, the studio finds out about a delay when the installer arrives.
Revisions are the margin leak
Every studio has absorbed revisions that should have been billed. It is rarely a pricing failure — it is that nobody can demonstrate what was agreed and when it changed.
A revision becomes billable only if three things can be shown: what was originally approved, what was subsequently requested, and that the client was told it was a change.
If approvals happen verbally or in a chat thread, none of this is retrievable months later, and the studio absorbs it rather than damage the relationship.
The requirement is not complicated software. It is that approvals are recorded against a version, and that a change request creates a record before work begins. A studio that adopts nothing else from this article and adopts that will see a difference.
Where the money actually is, per project
Studios frequently know overall profitability and not project profitability. The distinction matters because the average conceals which kind of work is worth taking.
Per project, tracked against a budget:
- Design hours, by person
- Procurement value and margin
- Site and installation costs
- Revisions absorbed versus billed
- Payments received against milestones
Most studios discover on doing this that a particular type of project — often the prestigious one — is substantially less profitable than a plainer one, because it absorbed revisions and coordination that were never priced.
What kind of system fits
This is a case where the sector difference is genuinely structural — the transaction lifecycle is a project running months with milestone billing, which is one of the four real differences identified in choosing technology for your sector.
But the requirement is narrower than "interior design software" implies. Most of what a studio needs is:
- A project record with a budget and a status
- Procurement tracked per item, per project, with dates and payments
- Approvals and revisions recorded against versions
- Milestone invoicing linked to project stages
- Costs attributed to projects rather than pooled
Rendering, CAD and visualisation are specialist tools that sit outside this and should stay outside it. Attempting to combine creative tooling with operational tracking usually produces something weak at both.
The portfolio is a commercial asset
One further observation specific to this sector: finished work is the strongest sales material a studio has, and it is routinely under-captured.
Photographing completed projects properly, with permission, and showing them where prospective clients look, does more than most marketing spend. It is evidence, in a business where evidence is the primary objection-handler — the proof layer described in distribution is a system, not a budget.
The failure is treating documentation as an afterthought once the team has moved to the next project.
What we would say honestly
Truffaire has not published case studies in interiors, and we are not going to imply experience we cannot substantiate. What we do build is operations systems where the structure above — project records, per-project costing, procurement tracking, milestone billing — is configured to how a specific business works rather than imposed as a fixed product.
For a studio, the honest first question is whether the problem is tracking or pricing. If revisions are absorbed because they cannot be evidenced, that is a system problem. If they are absorbed because the contract never allowed for them, no software fixes it.
Frequently asked questions
Do we need dedicated interior design software?
Often not. The operational requirements are project tracking, procurement and milestone billing — capabilities that exist in general systems configured appropriately. Specialist products bundle these with design tooling you may already have covered.
How do we stop absorbing revisions?
Record what was approved, and record change requests before executing them. Most absorbed revisions are absorbed because they cannot be evidenced, not because the studio chose to.
How should we handle client payments and supplier deposits?
Tracked per project, so cash position by project is visible. Studios that pool this discover late that a project is cash-negative while appearing profitable.
Can we manage this in spreadsheets?
Up to a point. The signals that it has stopped working are in the real cost of running on spreadsheets — most relevant here being multiple people needing to update the same procurement tracker.
What about site coordination?
Largely a communication problem, but the dependency is on procurement data. If arrival dates are unreliable, no amount of coordination fixes the schedule.
Where to start
Take your last three completed projects and calculate true profitability — design time, procurement margin, installation, and revisions absorbed.
If the numbers are hard to reconstruct, that is the finding. And if the most impressive project is the least profitable, that is a pricing conversation rather than a software one.
If you want a read on which part of your operation is actually leaking, get in touch.