Invoice Finance for Architecture Firms UK 2026

Architecture practices usually bill fees in stages, as each part of a project is finished, so there can be long gaps between invoices while salaries go out every month. Invoice finance lets you draw most of a stage invoice as soon as you raise it, instead of waiting for the client to pay. It only works on invoices you have already sent for work that is done. Market Invoice compares UK providers, and you can get 3 free quotes through our introduction partner, a UK invoice finance provider.

Stage billing and the cash gap

Many practices agree fees against the RIBA Plan of Work, which splits a building project into eight stages. How much of the fee falls in each stage is agreed in your appointment with the client. You invoice when a stage is done, then wait for the client to pay on your agreed terms.

The gap bites when a big stage invoice is waiting to be paid and the next stage has already started. Invoice finance can fund the invoice that is out. It cannot fund work you have not yet invoiced, so it will not cover the start of a project before the first fee invoice.

Keeping it confidential

With confidential invoice discounting you keep collecting from your clients yourself, and they are not told about the lender. With factoring, the lender collects and your clients deal with it. Discounting usually needs good bookkeeping and credit control, and some lenders set a higher minimum turnover for it. If client relationships matter most to you, ask each lender whether it offers discounting at your size.

Lenders to compare

These lenders publish some of their terms on their own websites. It is a starting list, not a ranking.

Figures as published on each lender's own website, checked 14 October 2026. None of these lenders publishes its fees.

What it costs

Lenders usually charge a service charge plus a discount charge on the money you draw. Most don't publish their fees, so you need a quote. Our invoice finance costs guide explains both charges, and the cost calculator gives a rough estimate for your own figures.

Selective finance for lumpy fees

If you only raise a few large invoices a year, selective (single invoice) finance may suit you better than a facility over your whole sales ledger. You choose which invoices to fund and pay only on those. Ask how the charge compares with a whole-ledger facility. Hydr, for example, funds single invoices; see our Hydr review and our selective vs whole-book calculator.