Staged Payments Explained: Paying for Building Work in Stages
Staged payments tie what you pay to what has been done. Here is how they work, when they suit a job, and how to set them up so both sides stay even.
The short version
Staged payments tie what you pay to what has been done. Set out clearly at the start, they keep the job moving and keep both sides even.
On a longer building project, the price is often paid in instalments rather than all at the end. Each instalment falls due when an agreed stage of the work is complete. You pay as the work progresses, and the contractor isn't left funding weeks or months of labour and materials out of their own pocket.
Shorter jobs are usually paid more simply: a deposit when you accept, and the balance on completion. Neither structure is better in general. What suits your job depends on its length, its size and how it naturally divides into stages.
This guide explains how staged payments work, when they make sense, how to set clear stages and what to check before each payment. It is part of our homeowner's guide to building quotes and payments.
How it works
Paying as the work progresses
A staged payment plan divides the agreed price into several payments, each linked to a defined point in the job. There is often a deposit at the start. After that, each payment is made once the stage it relates to has been completed.
The principle is that what you have paid should roughly follow the value of the work done. At any point in the job, you shouldn't be far ahead of the work, and the contractor shouldn't be far behind on payment. That keeps the arrangement fair for both of you.
The plan should be agreed before the work starts and written into the quote or contract. It should state each stage, what "complete" means for that stage, the amount due and when payment is expected. Our guide to payment schedules explains how to read one.
The deposit at the start is a separate thing with a separate purpose: securing the booking and covering early materials. Our guide to building deposits covers that part.
Which suits your job
Deposit and completion, or staged payments?
The right structure follows the shape of the job. These are general patterns, not rules.
Deposit, then balance on completion
- Shorter jobs, completed in days or a few weeks
- Repairs and single-element work
- Work that is hard to split into visible stages
- Simple to follow: two payments in total
- You pay the bulk once the work is done
- Typical of many repair and replacement jobs
Staged payments
- Longer projects running over several weeks or months
- Larger works such as extensions
- Jobs with clear, visible milestones
- Payments spread across the project
- Contractor funded as the job goes
- Needs clear stage definitions to work well
Setting stages
What makes a good payment stage
A payment stage works best when both of you can look at the job and agree whether it has been reached.
A milestone you can see
Stages tied to something visible, such as a part of the structure being finished, are easier to agree on than stages tied to dates or rough estimates of effort.
Defined in writing
Each stage should say what has to be complete before payment is due. A vague stage description invites disagreement about whether it has been reached.
An amount that matches the work
Each payment should roughly reflect the value of the work in that stage. A large payment for a small stage puts you ahead of the job.
Clear payment timing
Agree how soon after a stage is complete the payment is due. It helps the contractor plan, and it gives you time to check the work.
An invoice for each stage
Ask for an invoice or payment request at each stage, showing the stage, the amount, what has been paid so far and what remains.
A final stage worth having
Keep a meaningful payment for completion, so the last stage covers finishing, clearing up and any small outstanding items.
Getting it agreed
How to set up a staged payment plan
Do this before you accept the quote, not after work has started.
Agree the total price
The stages divide a fixed total. Settle what is included, and how any allowances or changes will be handled, first.
List the stages
Ask the contractor how the job naturally divides. They know the order of work, and their stages will usually match it.
Define each stage
For each one, write down what "complete" means in plain words, so either of you could check it.
Attach an amount to each stage
Check that the amounts track the work and that they add up to the total, including the deposit and any VAT.
Agree how payment is made
By bank transfer or debit card, to the business named on the quote, within an agreed time of each invoice.
Put it in writing
The plan belongs in the quote or contract. Our answer on whether you need a written contract for building work explains why that matters.
Pay for work done, not work promised. If you are asked to pay for a stage that hasn't been reached, or a payment runs well ahead of progress, pause and ask why. There may be a good reason, such as a large material delivery, but it should be explained and agreed.
An illustration
How stages might look on a larger project
Every job is different, and the contractor is the right person to propose the stages for yours. As a general illustration, a single-storey extension might be divided along these lines.
Deposit on acceptance, to secure the start date and early materials. Foundations complete, once the groundwork is done. Walls up, when the structure reaches the height the roof sits on. Roof on and weathertight, when the building is closed in. Internal work, once the main services and internal finishes have reached an agreed point. Completion, once the work is finished and the site cleared.
The exact stages, and the amount attached to each, should reflect the job and be agreed with your contractor. The illustration only shows the principle: visible milestones, each paid once it has been reached, with a real payment left for the end.
A shorter job, such as a roof repair or a rooflight installation, rarely needs any of this. A deposit and a balance on completion is usually the simplest and clearest way to pay.
When the job changes
How changes fit into a staged plan
Few longer projects run exactly to the original plan. Changes you ask for, allowances settled against the real cost and the odd delay all affect the payments, so it helps to agree at the start how they will be handled.
A simple approach is to add each agreed change to the invoice for the stage in which the work is done, listed separately so it can be matched to what you agreed. That keeps the stage amounts themselves unchanged and makes the running total easy to follow.
If a stage is delayed, the payment for it moves with the work, not with the calendar. That is one of the advantages of tying stages to milestones rather than dates: nobody pays for, or waits for payment on, work that hasn't happened yet.
If the order of work changes, for example because materials for one stage arrive late and the contractor starts on another, agree in writing how the payments will follow. A short message is enough.
At each stage
What to check before each payment
Has the stage been reached? Compare the work with the stage description. If you are unsure, ask the contractor to walk you through it. Photographs help both of you.
Does the invoice match the plan? The amount should be the one agreed for that stage, plus any agreed changes. Our guide to variations and extra costs explains how changes should be added.
Does the running total add up? Each invoice should show what has been paid so far and what remains. It should never be possible to pay more than the agreed price plus agreed changes.
Keep the record. Store each stage invoice and your payment confirmation with your quote. Our guide to invoices and receipts explains what is worth keeping.
When things don't line up
If a stage isn't finished
Sometimes a payment request arrives when the stage isn't quite complete. The calm response is to talk about it. Explain what you think is outstanding and ask when it will be finished. Often the answer is that a small item is waiting on a delivery, and the two of you can agree to pay once it is done, or to pay most of the stage now and the rest shortly after.
Some contracts include retention: a small part of each payment, or of the final payment, held back until an agreed period after completion, to cover defects that appear later. It is more common on larger projects. Our guide to retention on building work explains how it works if you are considering it.
Whatever you agree, confirm it in writing. And keep payments fair to both sides: a contractor who has done the work is entitled to be paid for it, just as you are entitled not to pay ahead of it.
The last payment
Finishing well: the final stage
Whether the job is paid in stages or as a deposit and a balance, the final payment is the one that marks the end of the job. It should fall due once the work is complete to the standard described, the site is cleared and any small outstanding items have been dealt with.
Before paying it, walk round the finished work, ideally with the contractor, and note anything that isn't right. Our guide to final payment and snagging explains how to handle that list fairly, and our answer on when to pay the final balance gives the short version.
If you are being asked to pay the whole price before the work is finished, our answer on whether you should pay before work is finished sets out what to consider.
How Mortaro structures payment
Two payments, both passed to your contractor
Mortaro coordinates domestic building work, mostly roofing, rooflights and larger domestic construction, carried out by an independent main contractor from our network and named in your quotation. The payment terms are simple: a 25% deposit to secure the works when you accept, and the balance on completion.
You pay by bank transfer. Both payments are legally made to your main contractor, and we pass them on as their payment administration agent without unnecessary delay. We do not hold client funds and we are not an escrow service.
Payments explained walks through each step.
Straight answers
Questions about staged payments
Are staged payments normal for building work?
On longer projects, yes. They let the contractor be paid as the work progresses rather than funding everything until the end. Shorter jobs are more often paid as a deposit and a balance on completion.
How many stages should there be?
There is no set number. It depends on the length of the job and how it naturally divides. Each stage should be a visible milestone you can both check.
Should I pay for a stage before it is finished?
Generally, pay once the stage has been reached. If there is a reason to pay part of a stage early, such as a large material delivery, agree it in writing first.
What does payment on completion mean?
It means the balance is due once the work is finished. Our answer on what payment on completion means explains how completion is usually judged.
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