What Is Billback? Definition & Examples

Detailed Explanation

In invoicing, a billback (or bill-back) recovers a cost your business paid for a client's job or on the client's behalf. It appears as its own line or on a separate invoice, normally with the receipt, at cost or with a markup if the contract allows one. The word has other industry meanings. A hotel billback sends a guest's stay to their employer or travel management company for payment after checkout. In card processing, billback pricing charges a lower rate at the time of sale and bills extra fees for some transactions on a later statement. This entry covers the invoicing sense.

Example

A consultant bills a client for a $420 return flight on a separate line, with the receipt attached, under the expenses clause in the contract.

Why It Matters

Pass-through costs you forget to bill come straight out of your margin. In VAT countries, whether a billed-back cost is a recharge or a true disbursement also decides whether you charge VAT on it.

Key facts

UK VAT: most billed-back costs are recharges, not disbursements. Costs you incur in making your own supply, such as your travel or postage, are part of the value of your supply, and you charge VAT on them even if the original cost carried no VAT (HMRC, VAT: costs or disbursements passed to customers).
A payment counts as a disbursement for UK VAT only if all eight of HMRC's conditions are met, including that you paid as your client's agent, the client received and used the goods or services, the client was responsible for paying, the cost is itemised separately and you pass on the exact amount (VAT Notice 700, paragraph 25.1.1).
HMRC's examples of recharges that carry VAT include an airline ticket for your own trip to a client, postage on your letters to customers, and a bank transfer fee you recharge even though the bank's own fee is exempt.
The EU VAT Directive excludes from the taxable amount sums a customer repays for expenditure incurred in the customer's name and on their behalf and kept in a suspense account; the supplier must prove the actual amount and cannot deduct VAT on it (Article 79(c)).
Whether you can bill back at cost or with a markup is a contract question. State in the engagement letter which costs are billable, whether a handling fee applies and what receipts you will provide.
In InvoiceQuickly, a billback is an ordinary line item. The app applies one tax percentage to the whole invoice, so a disbursement cannot be kept outside the VAT calculation on the same invoice; bill it on a separate document and check the treatment with your accountant. You cannot attach receipt files to an invoice, so send receipts separately.
This entry is general information, not tax advice.

How it shows up in practice

Illustrative example: a London web consultant invoices a client for 5 days of work at £500 (£2,500). They also paid a £160 train fare to the client's Edinburgh office for the kick-off meeting, and, at the client's written request, registered a domain in the client's name for £120. The train fare was the consultant's own cost, so it is a recharge: it joins the value of the supply, making the VATable amount £2,660 and VAT at 20% £532. Assuming the domain purchase meets all eight disbursement conditions, it is itemised separately at exactly £120 with no VAT. The client pays £2,660 + £532 + £120 = £3,312 in total, and the consultant does not reclaim any VAT on the domain.

Common mistakes

Treating every pass-through cost as a VAT-free disbursement, when your own travel and postage are recharges that carry VAT.
Billing back costs without receipts or a reference to the job, which invites queries and slows payment.
Adding a markup the contract does not allow, or labelling a marked-up cost as “at cost”.
Waiting months to bill expenses back, after the client's budget for the project has closed.
Reclaiming input VAT on a cost and then also treating it as a disbursement; HMRC says you cannot do both.

Frequently asked questions

What does bill back mean?

To bill back is to charge someone afterwards for a cost you paid first. On an invoice it means passing an expense such as travel, materials or a filing fee on to the client. In hotels it means sending the bill to the guest's company, and in card processing it describes fees added on a later statement.

What is the difference between a chargeback and a billback?

A billback adds a charge for a cost you incurred, so it increases what the client owes you. A chargeback is a payment reversal: a cardholder disputes a card payment and the money is taken back from the merchant. One raises the amount due; the other removes money you were already paid.

Should I charge VAT on billed-back expenses?

In the UK, usually yes. Costs you incur to deliver your own service, such as travel, are recharges and part of your VATable supply. Only payments that meet all of HMRC's disbursement conditions, such as a fee paid as your client's agent, stay outside the VAT calculation, and they must be itemised separately.

Can I add a markup to a billback?

Only if your contract allows it, and say so on the invoice. Many professional-services agreements bill expenses at cost; others allow a handling fee or percentage. A marked-up cost cannot be a disbursement for UK VAT, because a disbursement must be passed on at the exact amount paid.

Is billback one word or two?

Both forms are used. Dictionaries such as Merriam-Webster list “billback” as one word, and “bill back” as two words is common as a verb (“we will bill back the travel”). Pick one form and use it consistently in contracts and on invoices.

Related Resources

Last verified: October 2026

What Is Billback?