From accepted job to correct invoice: a simple billing handoff

The job is finished, but the person who sends invoices hasn't been told. Or they have, but they don't know what was agreed, who to bill, or whether anything changed along the way. The invoice goes out late, with the wrong details, or not at all.

This guide is for owners and office leads at small UK service businesses where the person who does the work isn't the person who sends the invoice. It shows how to agree when each kind of job should be billed, hand the invoicer one checked record, and have a person check the invoice before it's sent. It includes a blank "ready to bill" card and a fictional worked example.

It isn't tax or accounting advice. Where VAT applies, check HMRC's guidance or ask your accountant.

1. Agree when each kind of job is billed

Decide in advance what event means "invoice now" for each kind of job. We call this the billing trigger. Options include:

• On acceptance: when the customer accepts the quote.
• A deposit: part up front, the rest later.
• Stages: an invoice at each agreed stage of a longer job.
• A date: for example, monthly for ongoing work.

Write the trigger on the quote, alongside your payment terms, so the customer knows what to expect. When the trigger happens, record what shows it happened and when, such as an acceptance email or a sign-off message.

The trigger is a business arrangement between you and your customer. It doesn't change any tax rules about when an invoice must be issued. If you're VAT-registered, see section 3.

If you keep a list of accepted jobs, our guide to a simple work queue shows how to close a job with evidence and hand it on. This guide picks up at that handoff.

2. Hand the invoicer one checked record

The person sending the invoice shouldn't have to search through emails and messages. Give them one record with:

• the job reference
• the billing trigger, and the evidence that it has been met
• the agreed price and the version of the quote it comes from
• any agreed variations: changes to scope or price agreed after the quote, with a reference to where each was agreed
• the billing recipient: who the invoice must be addressed to. This may not be the person you dealt with, for example a landlord's agent or a company's accounts team.
• any purchase order number or customer reference
• whether both you and the customer are VAT-registered

Only agreed variations go on the invoice. If the record shows extra work that wasn't agreed, send it back to the job owner before billing it.

Our guide to mapping your enquiry-to-delivery process shows how to agree what passes between people at each handoff.

3. What an invoice must show

GOV.UK's guidance on what an invoice must include lists:

• a unique identification number
• your name, address and contact information
• the customer's name and address
• a clear description of what you're charging for
• the date the goods or service were provided (the supply date)
• the date of the invoice
• the amounts being charged
• the VAT amount, if applicable
• the total amount owed

The same page has extra rules on names for sole traders and limited companies. Check the version that applies to you.

If you and your customer are both VAT-registered, there are extra rules. GOV.UK's invoicing overview says you need to give them an invoice by law in that case, and HMRC's VAT record-keeping guidance (VAT Notice 700/21) sets out when a VAT invoice must be issued and what it must contain. Check those rules, or ask your accountant. Don't assume a VAT invoice can wait for the customer's sign-off. Deposits, stage payments and supply dates can affect timing.

Separately, an invoice isn't the same as a receipt. GOV.UK describes a receipt as an acknowledgement of payment.

4. Check before sending

Before an invoice goes out, a person should compare it with the handoff record:

• Does the price match the quote version?
• Are only agreed variations included, and are they correct?
• Is it addressed to the confirmed billing recipient?
• Is the purchase order number or customer reference included, if there is one?
• If both parties are VAT-registered, does it follow HMRC's VAT invoice rules?

If anything doesn't match, send it back to the job owner rather than guessing. Our guide on what to automate first explains why sending invoices needs stronger controls than an internal reminder. Even if a tool drafts the invoice, a person checks it before it goes.

5. After sending: hand over the follow-up

Once the invoice is sent, record:

• the invoice number and the date it was sent
• the due date, as agreed in your payment terms
• who follows up if payment doesn't arrive

From there, our guide to chasing an unpaid invoice covers the follow-up routine for business customers, including when to stop and how to handle disputes.

6. Use the ready-to-bill card

1. Copy the blank card into the tool you already use, one card per invoice.
2. The job owner fills in the trigger, evidence, price, variations and recipient.
3. The person checking compares the draft invoice with the card, and signs it off.
4. The invoicer records the invoice number, date sent, due date and follow-up owner.

Fictional example

Fictional example only: an invented two-person garden landscaping business, customer and figures. It is not a ScalePass client, not tax advice and not advice about payment terms.

The job is a patio, billed as a deposit and a final invoice.

The final invoice is £4,040: the £3,800 balance plus the £240 variation agreed on 12 March. The deposit was billed separately. This illustrates the handoff; it isn't a recommendation about payment terms or VAT.

Common questions

When should we invoice?

When the billing trigger you agreed for that kind of job is met. Put the trigger and your payment terms on the quote. If you're VAT-registered, check HMRC's rules on when a VAT invoice must be issued.

What if the scope changed?

Bill only variations that were agreed, and record where each was agreed. If the record shows extra work that wasn't agreed, send it back to the job owner before invoicing it.

Who should the invoice be addressed to?

The confirmed billing recipient. That may be someone other than the person you dealt with, so confirm it as part of the handoff.

Do we need a VAT invoice?

If you and your customer are both VAT-registered, extra rules apply. Check HMRC's VAT Notice 700/21, or ask your accountant.

Who checks the invoice?

A named person, before it's sent, comparing it with the handoff record. It can be the invoicer, as long as they check against the record rather than from memory.

ScalePass helps service businesses connect the steps from enquiry to finished work and invoice, using the tools they already have. If you'd like help setting up a reliable billing handoff, see how we approach connected systems.

In short

Agree the billing trigger for each kind of job, and put it on the quote with your payment terms. When the trigger is met, hand the invoicer one record: scope and quote version, agreed variations, billing recipient and reference. Include what GOV.UK says an invoice must show, and follow HMRC's rules if both parties are VAT-registered. Have a person check the invoice against the record before it's sent. Then record the due date and who follows up.