How to invoice for expenses and disbursements correctly

By InvoiceReminder Editorial Team · Published 6th August 2026

Invoicing for your time and expertise is straightforward, but billing for the extra costs you incur along the way can be a minefield. Get it wrong, and you risk confusing your clients, delaying payment, and even falling foul of HMRC's VAT rules. This guide explains how UK businesses can correctly invoice for expenses and disbursements, ensuring you get paid in full and on time while maintaining client trust.

We'll cover the crucial difference between recharged expenses and disbursements, how to handle VAT on each, and the best way to present these costs on your invoice so that your client's accounts payable department can process it without a single query.

What's the Difference? Expenses vs. Disbursements Explained

Many people use the terms "expenses" and "disbursements" interchangeably, but in the eyes of HMRC, they are completely different. Understanding this distinction is the first and most important step to correct invoicing.

Recharged Expenses

A recharged expense is a cost that your business incurs in the process of delivering your service to a client. Think of it as a cost of your business that you are choosing to pass on. The key is that the supply of the goods or service was made to you, for the benefit of your business, to enable you to do your job.

Common examples of recharged expenses include:

Your travel costs to a client's site (train tickets, mileage, hotel stays).
Specialist software you had to license to complete the project.
Your postage or courier fees for sending documents or products.
Subsistence costs like meals while working away from your usual place of business (if your contract allows you to bill for this).

In all these cases, your business is the customer. You bought the train ticket, you licensed the software, you paid the courier. You are then recharging this cost to your client.

Disbursements

A disbursement is a very specific type of cost. It's a payment you make to a third party on behalf of your client. For a cost to qualify as a disbursement for VAT purposes, it must meet a strict set of conditions defined by HMRC. The core idea is that you are simply acting as an agent, paying a bill that is truly your client's.

The official conditions are:

You paid the supplier on your client’s behalf and acted as the agent of your client.
Your client, and not you, received, used or had the benefit of the goods or services you paid for.
It was your client’s responsibility to pay for the goods or services, not yours.
You had permission from your client to make the payment.
Your client knew that the goods or services were from another supplier, not from you.
You show the cost separately on your invoice.
You pass on the exact amount of the cost to your client.
The goods or services you paid for are in addition to the main service you are providing.

Common examples of true disbursements include:

A solicitor paying a Companies House filing fee on behalf of a client.
An accountant paying a specific tax liability (like Stamp Duty) for a client.
A web designer purchasing a domain name that is registered in the client's name.
An architect paying for a local authority planning application fee on the client's behalf.

The distinction is critical for one main reason: VAT.

The Golden Rule for VAT: Disbursements vs. Recharged Expenses

How you handle Value Added Tax (VAT) on passed-on costs depends entirely on whether they are a recharged expense or a disbursement. Getting this wrong can lead to you either overpaying VAT to HMRC or undercharging your client, both of which hurt your bottom line.

Handling VAT on Recharged Expenses

If you are a VAT-registered business, you must charge VAT on any recharged expenses you bill to your client.

This often confuses people, especially when the original expense had no VAT on it (for example, train travel or postage stamps are zero-rated). The logic is that you are not just passing on the cost; you are making a new supply to your client. The expense is part of your overall cost of sale, and your final charge to the client is for a VAT-able service.

Example: You are a VAT-registered consultant. You travel from London to Bristol to see a client.

Your standard-class return train ticket costs £120. Standard UK rail travel is zero-rated for VAT.
When you invoice your client, you cannot just add £120 to the bill.
You must treat it as part of your taxable turnover. You invoice: Travel Expenses: £120.00 + 20% VAT = £144.00.
You declare the £24 of output VAT on your VAT return. You cannot reclaim any input VAT on the ticket itself, as none was charged.

Handling VAT on Disbursements

If a cost meets all of HMRC's conditions for being a disbursement, you pass it on at the exact cost you paid and you do not charge VAT on it. It is treated as being outside the scope of VAT.

You also cannot reclaim any VAT that the third-party supplier charged on the original cost. You are simply a link in the payment chain.

Example: You are a VAT-registered architect submitting a planning application for a client.

The local council's planning application fee is £462. This fee is outside the scope of VAT.
You pay the £462 on your client's behalf.
On your invoice, you list this as a separate line item: Disbursement: Planning Application Fee - £462.00.
You do not add VAT to this charge. The total you bill the client for this specific item is £462.

Table: Disbursement vs. Recharged Expense at a Glance

This table summarises the key differences for a VAT-registered business.

Feature	True Disbursement	Recharged Expense
Who is the supplier's customer?	Your client. You are just an agent.	Your business.
Who is responsible for payment?	Your client (you are just paying it for them).	Your business.
Can you add a mark-up?	No. You must pass on the exact cost.	Yes, if your contract allows.
How is it treated for VAT?	Outside the scope. No VAT is added.	Treated as a new supply from you. VAT must be added at the appropriate rate.
Can you reclaim input VAT?	No.	Yes, if VAT was charged on the original purchase.
Example	A solicitor paying the £13 Companies House filing fee for a client's new company.	A consultant charging for a £90 train ticket purchased to visit a client's office.

If you are not VAT-registered, the situation is simpler. You charge the client the gross amount you paid for any cost, whether it's an expense or a disbursement. You can't reclaim VAT on your purchases, and you don't charge it on your sales. However, it is still best practice to separate fees from passed-on costs for clarity.

How to Clearly Itemise Costs on Your Invoice

Vague invoices get queried. Queried invoices get paid late. The key to getting paid promptly for your expenses is transparency. A client's finance team needs to understand what they are paying for without having to email you for clarification.

Structuring Your Invoice

Never lump all your costs into a single line item. Structure your invoice to clearly separate your professional fees from any additional costs. A logical layout would be:

Fees for Services: This should be at the top and clearly describe the work you've done.
- e.g., "Consultancy services for Project Alpha - 20 hours @ £75/hr"
Recharged Expenses: Create a dedicated sub-section. List each expense as a separate line item.
- e.g., "Recharged Expenses"
Disbursements: If you have any, create another dedicated sub-section.
- e.g., "Disbursements"

Finally, provide clear sub-totals for your fees, expenses, VAT, and the final grand total. Most modern accounting software like Xero, QuickBooks, or FreeAgent makes this easy to format.

What Information to Include for Each Expense

For every single expense or disbursement you list, provide enough detail to answer any potential questions. Avoid vague descriptions like "Travel" or "Sundries".

A good line item includes:

Date: The date the expense was incurred.
Description: A clear description of what it was for.
Supplier: Who the original supplier was (e.g., GWR Trains, Royal Mail).
Amount: The net cost.

Poor Example:

Sundry Expenses - £185.00

Good Example:

Return Train Ticket, London to Manchester (15/11/2023) - £145.50
Client Lunch with J. Smith & P. Jones (15/11/2023, Pret a Manger) - £22.50
Special Delivery Postage for Project Documents (18/11/2023, Royal Mail) - £17.00

This level of detail pre-empts questions and demonstrates professionalism, building trust and speeding up payment.

Essential Documentation: Proving Your Costs to the Client

While you don't necessarily need to attach every single receipt to every invoice, you must be prepared to provide proof of your spending if asked. Good record-keeping is not just for your own tax return; it's a vital part of client management.

What to Keep on File

For every cost you pass on to a client, you should have a corresponding digital copy of the proof. This could be:

A scanned copy or clear photograph of a paper receipt.
A PDF invoice from an online supplier.
A digital train or plane ticket.

Store these files logically. A simple folder structure like Clients/[Client Name]/[Project Name]/Expense Receipts/ can save you hours of searching later. Name your files clearly, for example, 2023-11-15_TrainTicket_Manchester.pdf.

When and How to Provide Documentation

Your contract should set the expectation here (more on that below). Common approaches include:

On Request: The most common method. You itemise costs on the invoice and state "Receipts available on request." This keeps invoice emails clean but means you need to be ready to send them promptly if asked.
Proactively for Large Costs: If you're billing for a significant one-off cost, like a flight or a large software purchase, it's good practice to attach the PDF receipt to the invoice email. This heads off any "sticker shock" and shows transparency.
As an Appendix: For projects with many small expenses, you could collate all the receipts into a single PDF appendix and send it with your monthly invoice.

The right approach depends on your client and the value of the expenses. If a client always asks for receipts, start sending them proactively.

Setting Expectations: The Importance of Your Contract

The single best way to avoid disputes over expenses is to define the rules before you even start work. Your proposal, statement of work, or terms and conditions should have a clear clause covering billable costs.

This removes ambiguity and gives you a firm contractual basis to refer to if a client ever questions a charge.

Key Clauses to Include

Your expense clause should cover:

What is billable? Be specific. List the categories of expenses you will charge for, e.g., "Travel, accommodation, specialist materials, and courier fees."
Mark-ups: Will you be billing at cost, or will you add an administrative mark-up (e.g., 10%)? If you add a mark-up, you must state this clearly. Remember, this mark-up is always subject to VAT if you are VAT-registered.
Approval Thresholds: To maintain trust, it's wise to include a threshold for pre-approval. For example, "All individual expense items exceeding £250 require prior written approval from the client." This prevents nasty surprises for both parties.
Mileage Rate: If you charge for using your own car, state the rate clearly (e.g., "45p per mile, in line with HMRC's approved mileage allowance").
How they will be invoiced: State when the client can expect to be billed for expenses (e.g., "incurred expenses will be invoiced monthly in arrears alongside fees for services").

Having this in writing transforms a potential argument into a simple contractual matter.

Chasing Invoices That Include Expenses

Invoices with a long list of expenses can sometimes face payment delays. They require more scrutiny from the client's finance department than a simple one-line invoice for fees. Each line item might need to be checked and approved, slowing the process down.

This is where consistency and automation can be invaluable. Manually tracking which complex invoice is due, which client needs a reminder, and which expense is being queried is time-consuming and prone to error. Using an automated system like InvoiceReminder can ensure these invoices don't fall through the cracks. It sends scheduled follow-ups based on your rules, so you don't have to manually track which client has paid and which complex invoice needs a nudge.

If a client disputes a specific expense line item but not your main fee, a good tactic is to ask them to pay the undisputed amount immediately. You can say, "Please go ahead and settle the £2,000 fee for the services provided, and we can resolve the query on the £75 travel expense separately." This protects your primary cash flow while you sort out the smaller issue.

Frequently asked questions

Can I add a mark-up or admin fee to recharged expenses?

Yes, you can, provided your client has agreed to this in your contract. However, it's crucial to understand that if you are VAT-registered, the entire recharged amount plus your mark-up is subject to VAT. You cannot treat the original cost as a disbursement and just add VAT to your fee.

What happens if I'm not VAT-registered?

The process is much simpler. You don't charge VAT on your services or your expenses. You simply pass on the gross cost that you paid for any expense or disbursement. While the tax distinction is less critical, it's still best practice to itemise expenses clearly on your invoice to maintain transparency with your client.

A client is refusing to pay for an expense. What should I do?

First, calmly refer them back to the clause in your signed contract or agreement that covers expenses. If the expense is clearly covered by the terms they agreed to, politely point this out. If it's a grey area, you may have to make a commercial decision about whether the amount is worth disputing. In all cases, ask them to pay the undisputed portion of the invoice (your fees) immediately while you resolve the expense query.

Do I need to provide original receipts, or are copies okay?

Digital copies (scans or PDFs) are standard business practice and are almost universally accepted by clients. You should keep the originals (or high-quality digital copies) for your own business records, as required by HMRC for tax and VAT purposes. There is no need to post original paper receipts to your clients.

What's the most common mistake when invoicing for expenses?

The most common and costly mistake is incorrect VAT treatment. This usually involves either incorrectly treating a recharged expense as a VAT-free disbursement, or incorrectly adding VAT to a true disbursement. The second most common mistake is using vague descriptions like "Miscellaneous Costs," which are a red flag for any accounts payable team and will almost always delay payment.

Can I just add a percentage of the project fee to cover my expenses?

Yes, some businesses agree this with their clients to simplify administration (e.g., "Project Fee + 10% to cover all expenses"). This can work well, but be aware that this 10% is not a recharge or a disbursement. It is simply part of your overall fee for the project and the entire amount is subject to VAT if you are VAT-registered.

Getting paid for your expenses doesn't have to be a battle. By understanding the rules, setting clear expectations in your contract, and presenting information transparently on your invoice, you can ensure your costs are covered without friction. And when an invoice with expenses does become overdue, having a systematic chasing process is key.

InvoiceReminder helps UK freelancers, small businesses and accountancy practices automate their invoice chasing. By connecting to your Xero, QuickBooks, Sage or FreeAgent account, it sends scheduled email reminders for overdue invoices, so you can stop chasing by hand and focus on your real work. The system can also be configured to help accountants chase clients for missing documents. The Free plan currently includes unlimited email reminders at no cost.