Boat Maintenance Cost Per Year: The Cost Lines, a Worked Example and How to Track Them

What makes the annual figure move

Marinas and yards price by size first: berths by length (per metre or by length band), and lifting by length for each movement. The small print matters. At Gruissan, a boat wider than the maximum for its length band is charged on its actual beam, and a multihull pays the lower of two amounts: its length-band rate multiplied by 1.5, or the rate for the band that matches its beam. After size come the way the boat is kept (a marina berth all year, a swinging mooring, dry stack, ashore on the hard or on a trailer at home), her age and the state of the expensive kit (engine, batteries, sails, life raft), the engine hours you expect to run this season, and how much of the work you do yourself. Two boats of the same length can end up with very different budgets.

The annual cost lines, one by one

Here is what to budget for, what drives each line and where to get a real price. The list deliberately gives no averages: a marina's tariff comes from its office or website, and yards, insurers and engineers price on written quotes.

• Berth or mooring: an annual contract, a winter-only deal or nightly visitor rates, priced on length and sometimes beam. Check what the price includes (water, electricity, parking) and when the annual fee is invoiced.
• Insurance: the premium follows the boat's value, cruising area, level of cover and excess. Read your berth agreement as well, as it may ask for proof of third-party cover.
• Lift-out and antifouling: one lift out and one back in, days on the hard, a cradle or chocks, then pressure washing, antifouling and new anodes.
• Engine servicing: oil and filters, raw-water impeller, belts, anodes and the cooling circuit, at the hours or calendar interval set by the engine maker.
• Winter lay-up and recommissioning: where it freezes, the engine and water systems protected, storage ashore or afloat, covers, then fitting out again in spring.
• Safety kit: flares, extinguishers, the life raft service and the EPIRB battery each have their own date. Put each one in the budget for the year it falls due.
• Licence and certificates: on most UK inland waterways a boat must be licensed, insured and hold a valid Boat Safety Scheme certificate (see the FAQ).
• Fuel: not maintenance, but part of the cost of ownership. Track it on its own line so it doesn't distort year-on-year comparisons.
• Repairs: batteries, bilge pump, electronics, upholstery, rigging. Keep a contingency line and size it from what unplanned work has actually cost on this boat in past years.

A worked example from a published marina tariff

The boat is fictional, the prices are real. Take an 8.40 m motor cruiser, 2.90 m wide, on an annual contract at Gruissan, in the Aude on France's Mediterranean coast. The figures come from the marina's ‘Tarifs 2026 TTC’ price list, adopted by its port council on 24 November 2025 and approved on 9 December 2025 (read on gruissan-mediterranee.com on 1 October 2026). All prices include French VAT. With a lift-out in November and the hull work done within five days, berth and lifting come to €2,513 + €182 = €2,695 before any antifouling goes on. Outside the reduced-rate period, the same line comes to €2,877. Every marina sets its own tariff, so rerun the sums with yours.

• Annual berth, band H (up to 8.49 m long and 2.95 m wide): €2,513. The winter-only contract, October to March, is €1,510.
• Lift out, then back in: €182 each for a boat of 8 to 9.49 m, so €364. From 1 October to 15 February, annual berth holders pay half price: €182 for both.
• Days on the hard: five days free for annual berth holders, then €82 for each further block of five days.
• Cradle and chocks: the marina doesn't supply them, so they come from a yard, on a quote.
• Still to price from quotes: antifouling and labour, the engine service, insurance and any safety kit falling due.

Building your annual budget: a checklist

A useful budget fits on one page: one line per cost and three columns for planned, actual and the difference. Draw it up before the season and review it at the end, once every invoice is in.

• Gather the last twelve months of invoices and quotes and sort them by cost line, with fuel kept separate.
• Download this year's tariff from your marina or harbour office: berth, lifting, hard standing, electricity.
• Get two written quotes for each big job: lift-out and antifouling, engine service, lay-up.
• List this year's due dates: insurance renewal, safety kit to replace, life raft service, licence or certificate renewals.
• Estimate the engine hours you will run, to see whether a service threshold falls this season.
• Add a contingency line, sized from the boat's own history.
• At the end of the season, compare planned and actual line by line and adjust next year's figures.

Cutting costs without cutting corners

Lasting savings come from organisation, not from skipping jobs. Group the work around a single lift-out: the lift you have already paid for to antifoul the hull also gives access to the anodes, seacocks and propeller. Look out for reduced-rate periods, such as half-price lifting at Gruissan from October to mid-February for annual berth holders. Do the jobs you can do properly yourself (cleaning, checks, logging engine hours) and leave the rest to professionals. And keep to the engine maker's schedule: a skipped service saves nothing if it ends in a breakdown in mid-season. Intervals, oils and parts come from the manufacturer's manual for your engine and boat. Whatever the budget, four things are not up for negotiation.

• Replace safety kit as soon as it reaches its date.
• Check seacocks and through-hulls at every lift-out.
• Keep an eye on the raw-water impeller and the cooling circuit.
• Keep batteries and bilge pumps in good order, above all on a boat left unattended for weeks.

Tracking the real cost of each boat

A budget only helps if you compare it with what was actually spent. The method comes down to three habits: attach every invoice to the boat it concerns, give it a category (engine, hull, safety, berth, insurance and so on), and total the same period every year. Keep quotes apart from invoices, and fuel apart from maintenance. If you manage boats on behalf of owners, this is also the backbone of your owner reporting: each owner should be able to see what their boat cost, and why. In Captain Crews, fleet management software for boat operators, every supplier invoice or quote is attached to a boat; automatic reading picks up the supplier, date, net, VAT and gross amounts, and suggests categories (engine, hull, safety…). The boat's Invoices page totals the selection for the period you choose, across all categories or just one. Fuel has its own tracking, per boat and across the fleet, and owners can view the invoices for their own boats from their account.