Two genuinely different ways to charge for the same work, what each one actually commits you to, and a worked example of how the numbers can play out.
Short answer: a one-off fee is a single payment for a finished, handed-over site — simpler, but it ends your income from that client the day it's paid. A retainer is a smaller recurring fee for ongoing hosting, updates and support — it builds toward steadier income, but only once enough clients are on it, and it commits you to actually doing the ongoing work. Neither is universally "better" — which one wins over a year depends entirely on your specific prices, which is worth actually calculating rather than assuming.
"Charge once or charge monthly" gets treated as a solved question online, usually in favour of retainers, on the logic that recurring income always beats one-off income eventually. That's true only past a crossover point that depends entirely on your actual numbers — which is worth working out for yourself before picking a model on faith.
You build the site, hand it over, and get paid once. Simple to explain, simple to invoice, and it ends your involvement (and your income from that client) the moment it's finished, unless they come back for more work later. See our guide on what to actually charge for the pricing side of a one-off build.
You charge a smaller amount every month for hosting, minor updates, and being the person who fixes it when something breaks. It builds toward steadier income as clients accumulate, but only commits real, ongoing work in exchange — a retainer client you never actually service is a liability the moment they notice.
Imagine landing one new client roughly every four months across a year — three clients total by month 12 — and compare a £600 one-off fee against a £40/month retainer, paid from the month each client signs:
A hypothetical scenario with the exact assumptions stated above — not a projection, a guarantee, or data from any real client base.
In this specific example, the one-off route is still ahead of the retainer at month 12 — £600 upfront is simply a lot of £40 months (15 of them) for a retainer to catch up to. That's the actual point: the popular claim that a retainer always overtakes a one-off eventually depends on how big the gap between the two fees is, and over what timeframe. A higher monthly retainer or a lower one-off fee would cross over sooner. Run this with your own numbers rather than assuming either direction.
A one-off fee suits a client who wants a finished deliverable and no ongoing relationship, and suits you if you'd rather not be on the hook for support later. A retainer suits a client who wants someone accountable for keeping the site working, and suits you if you actually want the recurring income and are willing to do the recurring work it requires. Many freelancers offer both: a one-off build, with an optional retainer for whoever wants the ongoing peace of mind. See our guide on following up on a pitch for how to raise either option without it feeling like an upsell.
Not automatically — whether it overtakes a one-off fee depends entirely on your actual numbers. A large one-off fee against a small monthly retainer can take a long time to catch up to, so it's worth doing the maths on your own prices rather than assuming a retainer always wins long-term.
Typically hosting, minor content updates, and being the person who fixes it if something breaks. It should be written down explicitly, because "maintenance" means different things to different people and a vague retainer is where scope creep usually starts.
Yes, and it's common — a one-off build followed by an optional ongoing retainer for hosting and updates is a normal structure. It's harder to go the other way, since a client already used to a flat monthly fee may resist a sudden large one-off ask.