A tender estimate gets read by people who were not on the walk round with you. It gets compared line by line against other contractors' numbers, and it gets picked apart if it looks thin anywhere. That means a tender price has to do more work than a straightforward job quote, and it has to be built to hold up under scrutiny before it's built to win.
Knowing how to structure a tender estimate is as much about presentation as pricing. Two contractors can arrive at similar totals and one will look like they understand the job while the other looks like they guessed. The difference is almost always in how the number is laid out.
Start from the information you were actually given
Price against what is in the tender documents, not what you assume is probably there. Gaps and ambiguities in drawings or specifications should be flagged as qualifications rather than quietly priced around, because an assumption that turns out wrong after the contract is signed comes straight off your margin, not the client's budget.
Before any pricing starts, read the whole pack: drawings, specification, preliminaries, form of tender and any pricing document the client has supplied. If the client has issued their own bill of quantities or pricing schedule, price in their format. Reformatting it into your own layout makes comparison harder for the person assessing it, and that rarely helps you.
How to structure a tender estimate so it can be checked
A single lump sum invites suspicion. Break the price down along NRM2 lines so a client, or their advisor, can see where the money sits without having to ask you to justify it line by line after the event. A tender that is easy to check is also easier to win, because it looks like the work of someone who actually knows the job.
A clear structure usually runs in this order:
- Preliminaries. Site set-up, supervision, welfare, scaffold, insurances and anything else that exists because the job exists. Priced as its own section, not spread across the rates.
- Measured work by element. Substructure, frame, upper floors, roof, external walls, windows and doors, internal finishes, services, external works, drainage. Each with quantities, units and rates.
- Provisional sums. Clearly listed, with a short description of what each covers and whether it was set by the client or by you.
- Overheads and profit. Shown as their own line or percentage, depending on what the tender asks for.
- Qualifications, assumptions and exclusions. A separate, numbered list the client can read in two minutes.
A tender that's easy to check looks like the work of someone who knows the job. That's half the battle won before the price is compared.
Where tenders go wrong
The same mistakes turn up again and again. Risk gets allocated vaguely instead of priced explicitly, so nobody knows who is carrying it until a problem shows up on site. Running costs and maintenance implications of a specification get ignored because the tender only asks for a capital number. Programme risk gets left out entirely, even though a tight programme is a cost in itself.
Say the tender asks for completion in a timescale that means two gangs working at once instead of one. That's more supervision, possibly more scaffold at the same time, and less room to absorb a week of bad weather. None of that shows on the drawings. All of it belongs in the price, usually in the preliminaries, and it should be visible there rather than buried.
A few more that catch contractors out:
- Unpriced items. A blank line in a client's pricing document can be read as included at nil cost. If something is excluded, say so.
- Inconsistent rates. The same item priced at different rates in different sections looks careless and invites questions.
- Buried qualifications. Assumptions scattered through the cover letter are easy to miss and easy to dispute later.
- Arithmetic errors. A total that doesn't add up can cost you credibility, or the job, even when the pricing itself was sound.
The tender is the start of the relationship, not just a number
However the process is run, treat the tender stage as the first chance to show a client how you actually work: plain pricing, clear qualifications, and a number you can defend line by line if asked. That reputation follows you into the next tender list a lot more reliably than being the cheapest number on the page.
A structured tender also helps you after the award. The same breakdown becomes the baseline for valuations and variations, so the effort spent laying it out properly keeps paying back for the rest of the job. When a variation arrives, there's already a rate for similar work, and a clear record of what was and wasn't included in the first place.
Getting the tender built in time
The hard part isn't knowing how a tender should look. It's getting it measured and priced properly while the deadline gets closer and the current jobs still need running. Our tender pricing for main contractors is set up for exactly that: send your drawings and specification and we measure every element to NRM2, price it on current UK rates, local to the job, and deliver to your tender deadline for a fixed fee agreed up front. For more on outsourcing the whole exercise, see our guide to tender pricing services.
One test before you submit
Hand your tender to someone who hasn't seen the job and give them ten minutes. Can they tell you what's included, what isn't, what's provisional and where the biggest costs sit? If they can, you've worked out how to structure a tender estimate that survives being read. If they come back with questions, so will the client, and you won't be in the room to answer them.