The Real Cost of Cruising: A Financial Framework for Going Offshore

Every published cruising budget I've found — the Noonsite surveys, the YouTube spreadsheet videos, the Pardey books — carries the same silent assumption: two adults, no kids. I'm planning a five-year circumnavigation with four kids who'll all still be in single digits when we cast off, so I've spent more evenings than I'd like to admit rebuilding couple math for a crew of six. Some of it scales the way you'd guess. The important parts don't.

First, the honest baseline. Ask what cruising costs and you'll hear anywhere from $1,500 to $10,000 a month, and the spread isn't evasion — costs genuinely vary by an order of magnitude depending on the boat, the region, and your tolerance for marina bills. But the structure underneath is predictable, and structure is the thing you can plan against.

The Three Budgets

Every cruising plan has three financial components. Most people obsess over the first and ignore the other two.

The acquisition budget is what it costs to buy and refit the boat. A capable bluewater boat runs $50,000 on the used market — older Westsails, Valiant 40s, well-kept production boats from the '80s and '90s — or north of $2,000,000 for a new Outremer in bluewater spec. For an older boat the refit routinely equals or exceeds the purchase price, and it's where budgets go to die when the work isn't scoped honestly.

In my day job I'd call the acquisition trap an asset-allocation error: the boat that's perfect at $300,000 but leaves nothing behind it is strictly worse than the boat that's good enough at $150,000 with $150,000 still in the account. Illiquid asset, no income, high carrying cost — you'd never let a client do this with a vacation home, and a boat is a vacation home that depreciates and occasionally tries to sink.

The cruising budget is the monthly operating cost. It determines how long you can stay out, and it's the number most people underestimate.

The reserve fund is money you don't touch unless something breaks — a rig failure, a medical emergency, an unplanned haul-out. Without it, every surprise becomes an existential threat to the cruise.

What Cruising Actually Costs — Couple Math

The survey data describes a couple on a 38–48 foot monohull or catamaran, full-time, tropical and temperate waters. Three tiers:

Bare-bones, $1,500–2,500/month. Anchor almost everywhere, cook aboard, provision from local markets, fix everything yourself, stay in cheap regions — Central America, Southeast Asia, parts of the Caribbean. The Pardey model. Achievable, but it demands discipline and real mechanical skill.

Comfortable, $3,000–5,000/month. A mix of anchoring and marinas, restaurant meals, Starlink, marine insurance, an annual yard bill, moderate-cost regions. This is where most full-time cruisers land after the first year humbles their spreadsheet.

Premium, $6,000–10,000+/month. Regular marinas, full-service yards, high-season Med or Australasia, a modern catamaran with every system running. This is the reality for many catamaran owners whether they intended it or not.

Where the Money Goes

Allocation is surprisingly consistent across tiers. Maintenance and repairs take 25–35% — the largest and least predictable line, and the old 10%-of-boat-value rule understates it for a boat that's actually being sailed. Food runs 15–25% depending on region (Thailand is cheap, French Polynesia is eye-watering). Insurance is 8–15% — figure 1.5–3% of insured value annually, so $5,000–9,000 a year on a $300,000 boat. Marinas are 5–15% (zero if you swing on the hook, $150+/night in the high-season Med), connectivity 3–5% now that Starlink is a standard line item, fuel 5–10%, permits and visas 2–5%, and personal spending — excursions, flights, clothing, the cost of existing as a human — 10–15%.

The Family Multiplier

Now break the couple assumption. Provisioning scales roughly per mouth. Insurance and moorage barely scale at all. But feeding and berthing six people forces a bigger boat — that's the entire reason we're researching 50-foot catamarans instead of 42s — and a bigger boat drags every percentage line up with it: more hull to insure, more bottom to paint, bigger sails, two of everything.

And two categories exist for families that no cruiser survey includes. Flights home: a family emergency means six seats from wherever you are, and six seats from Tahiti is a five-figure event, not a footnote. Medical evacuation: adult evac coverage is standard, but confirm in writing that your policy will medevac a child — pediatric coverage is its own line, and the gap only becomes visible when it's too late to fix. My working multiplier, after building this spreadsheet a dozen different ways: take the comfortable-tier couple budget and multiply by 1.4–1.5 for a crew of six, before the bigger-boat effect.

The 4% Rule Doesn't Survive Offshore

Income first, briefly. Remote work is the most reliable funding source afloat — Starlink has made consulting, software, design, and my own trade genuinely portable, with time-zone management as the real constraint. Content creation pays a handful of channels and takes one to two years of consistent output before it pays anyone; treat it as a supplement, not a strategy. Seasonal boatyard and delivery work aligns naturally with the cruising calendar.

But most plans lean on portfolio withdrawals, and here I'll put on the day-job hat: the 4% rule assumes a spending flexibility that a cruising family doesn't have. Ashore, a bad market year means you skip the kitchen remodel. Offshore, you cannot defer standing rigging, skip a haul-out, or ask hurricane season to wait — and selling equities into a 30% drawdown to fund a rig replacement is how retirement plans die a decade early. My plan holds two full years of cruising expenses in cash and short Treasuries, with the portfolio behind it. That's a drag on returns. It also means no market event between here and Fiji can force a fire sale.

The Number You Actually Need

Work backward. Our target family budget is about $5,500 a month. Sixty months, times a 1.25 buffer for the surprises that always come, is $412,500. Add a $50,000 reserve and the cruising fund is roughly $460,000 — before a single dollar toward the boat or the refit. That number stopped me the first time it came off the spreadsheet. It didn't change my mind; it changed the savings rate.

If you're running this math for your own boat and crew, the Bluewater Catamaran Buyer's Worksheet is the framework I use to keep acquisition cost and cruising fund honest against each other.

The boat gets you there. The money keeps you there. Plan both with equal rigor.

References: cruiser surveys (Noonsite, Cruisers Forum), Lin and Larry Pardey, Attainable Adventure Cruising, Sailing Totem, The Boat Galley financial guides