A disbursement is a cost your solicitor pays to a third party on your behalf as part of a legal matter. Disbursements usually aren't part of your solicitor's legal fees – it’s a separate, out-of-pocket expense that’s charged back to you at the exact amount paid.
If you’re buying a house, for example, your conveyancing solicitor will need to cover the cost of local authority searches, Land Registry fees, or management pack charges in the first instance, then charge you after (usually post-completion). In a court case, it might include things like court fees, medical report costs, or expert witness charges.
Disbursements should always be clearly listed on your bill, so you can see exactly what you’re paying for. They’re usually non-refundable, even if your case doesn’t go ahead, so it’s a good idea to check these costs upfront.