What Is a Stage Payment?
Stage Payment

On a job that takes weeks or months, waiting until the end to be paid means financing the whole project yourself, often for longer than you expect: materials, your time and your overheads. Stage payments spread the price across the job, so money comes in as the work progresses. They are standard in construction, common in design and software projects, and useful for any business doing larger jobs for new customers.

How stage payments work

The customer and supplier agree, before work starts, how the price will be split and what triggers each payment. Triggers can be dates, milestones or measured progress:

Invoicing each stage

Issue a separate invoice for each stage, with its own number from your normal sequence. The description should name the contract and the stage: "Kitchen refit, 12 Elm Road: stage 2 of 3, first fix complete, 40% of £12,000". Show the running position if it helps: total contract value, invoiced to date, and remaining. Each invoice has its own due date under your payment terms; the invoice due date calculator works it out.

VAT on stage payments

For construction services under contracts that provide for periodic payments, VAT Notice 708 says the tax point for each supply is the earlier of receiving payment or issuing a VAT invoice, and there is no basic tax point at completion unless special anti-avoidance rules apply. So VAT is due stage by stage, as you invoice or are paid, not all at the end. For other kinds of work, the normal tax point rules in VAT Notice 700 apply, and an advance payment or VAT invoice generally creates a tax point for the amount concerned.

If the domestic reverse charge applies to the contract, each stage invoice carries the reverse charge wording, and CIS deductions are made from the labour element of each stage payment.

Stage payments and retentions

In construction, stage payments often come with a retention: a percentage of each payment held back until the work is proven. Each stage invoice then shows the gross value of work, the retention held, and the net amount due. The retained amounts are invoiced later, when release dates arrive. See retention payment for how retentions work and their own VAT tax point.

Why stage payments protect small businesses

Cash flow. You are paid as you spend, so you do not fund the whole job.

Risk. If a customer stops paying, you are owed one stage, not the whole project.

Early warning. A customer who is late with the first stage payment is telling you something before you have committed everything.

Momentum. Payment at each milestone gives both sides a natural checkpoint to agree the work so far before moving on.

Fewer disputes. Problems surface at each stage, while they are small, rather than all at once in a large final invoice the customer is reluctant to pay.

Agreeing stages that work

Tie each stage to something both sides can see: a finished room, a delivered draft, a test passed. Vague triggers such as "on progress" invite argument. Front-load the first stage enough to cover your early costs, especially materials. Keep the last stage small enough that a delay in sign-off does not hurt your cash flow, but large enough that the customer has a reason to sign off. Put the schedule in writing in the quote or contract, and repeat it on each invoice, so the customer's approver can see at once which stage is being billed.

Stage payments for freelancers

For design, writing, development and other creative work, stages usually follow deliverables: brief and concept, first draft, revisions, final files. A deposit before starting is common for new clients. The guide on how to invoice as a freelancer covers milestone invoicing, and invoice payment terms covers deposits and terms.

A worked example

A kitchen fitter agrees a £12,000 job with a homeowner: 30% on booking, 40% when the units are fitted, 30% on completion. She invoices £3,600 on booking, due in 7 days; £4,800 when the units are in; and £3,600 on completion. When the homeowner delays the final payment for three weeks over a small snag, the fitter is owed £3,600, not £12,000, and has already been paid for the materials and most of her time, so the snag can be fixed calmly rather than argued over.

Stage payments under construction contracts

Construction work has its own statutory framework. The Housing Grants, Construction and Regeneration Act 1996 gives a party to a construction contract the right to be paid by instalments, stage payments or other periodic payments, unless the work is expected to last less than 45 days. It also requires contracts to set out how much is due and when, and the payment notices that go with each payment. In practice, many subcontractors apply for payment monthly, the contractor values the work and issues a payment notice, and the subcontractor then invoices. Read the payment provisions of any construction contract closely; they decide when stage payments fall due.

Stage payments and your income tax

For your own tax, each stage payment is business income. Under the cash basis, which most sole traders use, you count it when you receive it, so a project spanning two tax years spreads its income across both. Under accruals, income counts as the work is done. Either way, keep each stage invoice and the payment record together, so the income figure on your return can be traced invoice by invoice.

When a stage payment is late

A late stage payment is treated like any other late invoice. For a business customer, statutory interest can run from the day after each stage's due date, and fixed compensation of £40, £70 or £100 can apply to each late payment. The late payment interest calculator works out the figures. Many contracts also allow the supplier to pause work if a stage payment is not made; check yours before relying on it, especially in construction, where the statutory rules on suspending work are specific.

Deposits compared with stage payments

A deposit is the first stage, paid before work begins, and it does two jobs: it funds early costs such as materials, and it shows the customer is committed. For a VAT-registered business, receiving a deposit generally creates a tax point for that amount, so a VAT invoice for the deposit is usually the right document. Some businesses send a proforma invoice first to request the deposit, then a VAT invoice once it is paid. Later stages then follow the milestones agreed.

Common mistakes

• No written schedule. Stages agreed verbally are easily disputed.
• Invoicing the stage before it is reached. Invoice when the trigger happens, not in anticipation.
• Forgetting VAT timing. For construction contracts, VAT is due stage by stage.
• One invoice number for all stages. Each stage is a separate invoice with its own number.
• A final stage too large. It gives the customer leverage over any small snag.
• Not chasing each stage. A late stage payment left unchased tends to become two late stages, then three.

Tracking stages across a project

For each project, keep a simple schedule: each stage, its trigger, its amount, the date invoiced, the invoice number, the due date and the date paid. Review it weekly while the job runs. It shows at a glance whether the customer is keeping up, what is due next, and how much of the contract value remains. At the end, the schedule, the invoices and the payment records together explain the whole project, which is exactly what you need for your accounts and for any dispute.

Stage payments in software projects

Software and web projects often use stages tied to sprints or releases. Because scope in software tends to change, agree up front how changes affect the stages: whether new features become a new stage, extend an existing one, or are billed at a day rate. The day rate calculator helps price change requests consistently.

Related terms

Stage payments often sit alongside a retention payment in construction and a deposit in other work. They are set out in the payment terms you agree. For construction invoicing more broadly, see retention payments in construction and CIS invoice requirements.

The short version

Split a long job into stages that both sides can see, agree the split and triggers before starting, invoice each stage separately when its trigger is reached, and chase each one on its own due date. For construction contracts, remember that VAT is due stage by stage, and that retentions and CIS deductions come off each payment. Done this way, no single late payment can put your whole project at risk.