A consultancy can let clients spread a large project fee by taking a deposit and billing the balance later, by sending staged invoices tied to milestones or training dates, or by letting the client pay one invoice in instalments. All three make a big fee easier for a smaller client to say yes to, but they differ in how much risk you carry and how much admin each payment creates. Whichever you pick, agree the schedule in writing before the work starts.
In this article
The short version
- A deposit protects you most at the start of a project.
- Staged invoices keep payment close to delivery.
- Instalments on one invoice ask the least of the client.
- Direct debit collects each instalment on its date without chasing.
- A finance provider lends the client the money; a payment plan means the client pays you over time.
Deposit, staged invoices or instalments
HR, training, compliance and advisory work often lands as one sizeable fee, and smaller clients can find a single invoice hard to approve. Spreading it out helps them, and each way of doing so shifts the balance between your cash flow and their budget.
| Option | How it works | Good for | Trade-off |
|---|---|---|---|
| Deposit and balance | Part of the fee before work starts, the rest on completion | Short projects with a clear end date | You still wait for most of the fee, and the balance arrives when the work is already done |
| Staged invoices | An invoice at each milestone, module or training date | Longer projects with natural break points | More invoices to send and track, and a delayed stage can delay the payment tied to it |
| Instalments on one invoice | One invoice for the full fee, paid in agreed parts over set dates | Clients who are happy with the scope but need to spread the cost | Payments can run on after the work ends, so you carry the gap |
A deposit protects you most at the start. It shows the client's committed and covers early costs such as venue bookings or preparation time. Staged invoices keep payment close to delivery, which suits a programme that runs over several months. Instalments ask the least of the client, since the price is agreed once and it's only the timing that's spread.
You can combine them. Say your consultancy quotes £7,380 for a compliance training programme. The client pays a £1,620 deposit on signing, then four monthly instalments of £1,440 by direct debit. The client knows what's leaving their account each month, and you've got some money in before the first session.
How to collect each payment without chasing it
The more payments a fee is split into, the more there is to chase if each one relies on the client remembering. Direct debit takes that away. The client signs once, and whoever collects has to tell them in advance how much they'll take and when.
With Adfin you can set up an instalment plan and collect each part by direct debit on its agreed date, and the parts don't need to be the same size. Your client gets notice at least three working days ahead of every collection. Clients who'd rather use a card can save one instead, and it's charged on each instalment date with a reminder the business day before. Direct debits over £2,000 carry an extra charge, so it's worth checking the size of any large instalment.
If a direct debit fails, Adfin tries it again at no charge, and if you turn it on it can also try the client's saved card or send them a payment link. Each instalment collected is then marked as paid in Xero or QuickBooks without you doing anything, which shows you at a glance which ones have landed.
How a payment plan differs from finance
A finance provider lends the client the money. The client repays the provider over time, and the provider's terms are between the two of them.
With a payment plan, the client owes you the balance and pays you directly over time. Adfin collects each instalment as it falls due but doesn't advance the money, so it's worth building the wait into your own cash planning, especially if your costs come early in the project.
What to put in the written plan
It's easiest to agree the schedule before the work starts and put it in your proposal or engagement letter. A written plan needs:
- the total fee and each payment amount
- the date of each payment
- how the client will pay, for example by direct debit
- what happens if a payment is missed, such as a retry followed by a payment link
Clients can cancel a direct debit through their bank at any time, so keep the agreed schedule in writing. If a client who's already on standard terms later asks for more time, you can set up an instalment plan for them from the aged debtors view.
Common questions
Can I let a client pay one invoice in instalments? Yes. You agree the amounts and dates with the client and collect each part as it falls due, often by direct debit so no one has to remember.
Should I take a deposit before starting a consultancy project? A deposit is common for larger projects because it confirms commitment and covers early costs. Agree the amount and when it's due in your proposal.
Is it better to split a project into stages or offer a payment plan? Stages suit work with clear milestones, since payment follows delivery. A payment plan suits clients who need a steady monthly cost regardless of when each piece of work happens.
How do I collect instalments without chasing each one? Set them up as direct debits or charge a card on file, so each payment is taken on its date. The client is told before each collection.
What happens if a client misses an instalment? It's retried free, with a saved card or payment link as a backup if you've switched those on. If it's still unpaid, talk to the client and update the written schedule.
Is offering a payment plan the same as offering finance? No. A finance provider lends the client the money, while a payment plan means the client pays you directly over time.
Sources
- Small Business Commissioner - Building good payment practice in your new business (accurate as of October 2026) https://www.smallbusinesscommissioner.gov.uk/help-and-guidance/all-advice/building-good-payment-practice-in-your-new-business/
- Small Business Commissioner - Help with unpaid invoices (accurate as of October 2026) https://www.smallbusinesscommissioner.gov.uk/help-and-guidance/all-advice/help-with-unpaid-invoices/
- Pay.UK - Using Direct Debit (accurate as of October 2026) https://www.directdebit.co.uk/using-direct-debit/
- Pay.UK - The Direct Debit Guarantee (accurate as of October 2026) https://www.directdebit.co.uk/direct-debit-explained/direct-debit-guarantee/
