When a UK SMB owner asks "how do you price your work", there are basically two answers a consultancy can give. They sound similar to a buyer. They are not the same. The choice between them shapes the entire engagement.
This post is about the practical difference, when each one fits, and the small number of red flags that tell you a consultancy is offering the wrong model for the job.
The two models in one paragraph each
Day-rate consultancy charges for time. £800 a day, £1,200 a day, £2,000 a day for senior people in some sectors. The consultancy commits to providing an expert; the client commits to paying for hours worked. Outcomes are not formally part of the contract. If a piece of work takes three days, you pay for three days. If it takes three weeks, you pay for three weeks.
Fixed-fee consultancy charges for a defined deliverable. £5,000 to deliver a written audit. £8,000 to ship a working automation. £15,000 to build a customer portal. The consultancy commits to delivering a specific outcome by a specific date for a specific price. If it takes longer than expected, that is the consultancy's problem.
Both models are legitimate. Both have legitimate use cases. The trick is matching the model to the work.
When day-rate genuinely wins
There are real engagements where day-rate is the right call:
The scope is genuinely undefined. When a client cannot describe the problem clearly enough to write a fixed scope, day-rate buys exploration time. A senior advisor walking through the operations for two days, asking questions, may be the only sensible engagement to start with.
The work is varied and ongoing. A long-term advisor relationship where the work shifts week to week. Strategy support. Board-level coaching. Anything where the value is access to judgement rather than completion of a deliverable.
The client is sophisticated and prefers it. Some buyers genuinely prefer day-rate because they trust their own ability to manage scope. They want to control hours actively, redirect the work mid-engagement, and pay only for what they used. Fair enough.
Specialist expertise that is hard to scope. A barrister, a forensic accountant, a clinical specialist. The work depends on what the situation reveals. Fixed-fee is hard to write when you genuinely cannot predict the inputs.
For everything else, day-rate is mostly a structural advantage for the seller, not the buyer.
When fixed-fee genuinely wins
For most operational consulting and most build engagements:
The deliverable is specific enough to scope. "Map our operations and produce a punch list." "Build the workflow that connects A to B and runs nightly." "Replace this Excel model with a small custom application." These have shapes. They can be quoted.
The buyer wants predictable cost. UK SMB owners are not running large procurement departments. They want to know what something will cost before approving it, not at month-end after a stack of timesheets has piled up. Fixed-fee aligns the cost question with the decision moment.
The buyer wants the consultancy to absorb scope risk. A fixed-fee engagement transfers the risk of "this took longer than expected" from the buyer to the consultancy. That is exactly the right way around. The consultancy is in a better position to estimate how long it will take, and has the operational levers to manage the risk.
Trust is being built. Fixed-fee makes the cost-benefit conversation cleaner. A first-time buyer can see the price, agree the deliverable, and judge the work without arguing about hours. That makes the second engagement easier to commission.
The red flags
Three signals worth watching for when a consultancy quotes a model:
Day-rate quoted for a clearly defined deliverable. If the work is "build us a CRM integration" and the consultancy refuses to fixed-price it, that is a signal. Either they cannot estimate the work (worrying), they expect the work to balloon (worrying), or they prefer the open-ended billing structure (worrying). A consultancy that can deliver should be able to scope it.
Fixed-fee with vague deliverables. The opposite trap. A fixed-fee engagement where the deliverable is "strategic transformation" or "discovery and roadmap" with no concrete outputs. The fixed price sounds reassuring but you cannot tell whether you got value at the end. Demand a list of specific things the engagement will produce.
The "discovery phase" pattern. Some agencies use a small fixed-fee discovery phase as a wedge into a much larger day-rate or retainer engagement. The discovery phase is honest by itself. The trap is that, by the time it ends, you have invested enough in the relationship that the day-rate phase feels inevitable. Watch for this. If the only way out of the discovery is into the next phase, the discovery was a sales process.
No exit point in the contract. Day-rate engagements should have a clean monthly or quarterly exit. Fixed-fee engagements should have a clear definition of "done". If neither is in the contract, the engagement defaults to "ongoing", and ongoing is what every consultancy wants.
What Orchestrix does (and why)
Every Orchestrix engagement is fixed-fee. The triage is free. The audit is from £2,500. Builds are quoted as fixed-fee, fixed-timeline, fixed-scope after the audit. The optional managed retainer is a fixed monthly fee.
There is no day-rate option. The reason: the work the bureau does is concrete enough to scope. Mapping operations and producing a punch list is a defined engagement. Building an automation that replaces a specific manual workflow is a defined engagement. Pretending otherwise would be the seller's-advantage model, not the buyer's.
The trade-off, which is honest to name: when scope drifts mid-engagement, the bureau absorbs the cost. That is the correct way around because the bureau is in a better position to estimate the work than the client is.
A simple decision rule
If the engagement can be described in one sentence with a deliverable in it, fixed-fee should be the default. If it cannot, the work probably is not ready to be commissioned yet, and the right first step is a paid scoping engagement that produces a deliverable specific enough to fixed-fee.
If you find yourself being talked into day-rate for work that should be fixed-fee, ask the question directly: "what would it cost to do this fixed-fee?". If the answer is "we cannot fixed-fee this", ask why. The answer reveals more about the consultancy than about your project.
What to do next
The 15-minute triage is free and ends with an honest answer on whether Orchestrix is the right fit. If it is not (which it is not in roughly half the conversations), there is a pointer to who is.
The operational audit is the bureau's first paid engagement, fixed-fee from £2,500. The audit fee credits in full against any build that follows, so if you proceed, the audit costs nothing in net terms.
If you have already had an engagement that went sideways on day-rate, the audit is the cheapest way to reset the relationship onto a fixed-fee footing. Bring the existing scope; the bureau will tell you honestly what is salvageable and what is not.