The hidden cost of the cruise single supplement
The per-person fare quietly assumes two people share the cabin — so as a solo cruiser you pay a supplement to sail alone. Here is how it works and what it really costs.
What the sticker leaves out
Advertised cruise fares are quoted per person based on two guests sharing a cabin. Sailing solo means the line still expects that cabin's revenue, so it charges you a supplement on top of the headline per-person fare.
Expressed as a percentage of the per-person fare — often ranging from around 25% up to 100% or more — it is the core cost. At the top of that range you effectively pay for a second, empty berth, roughly doubling the fare.
Purpose-built single cabins carry little or no supplement, but they are few and sell out early. When they are gone, a solo cruiser is back to paying the supplement on a standard double cabin.
Gratuities, port taxes and many fees are charged per guest, not per cabin — so travelling solo saves nothing on these, and they sit on top of an already-inflated fare.
Some lines waive the supplement if you agree to share with an assigned same-sex stranger. If no match is found, you may be moved to a cabin you keep to yourself — or the arrangement may not be offered on your sailing at all.
Reduced or waived-supplement offers are typically limited to select cabins, dates or sailings and can vanish once that allocation sells — so the deal you saw may not apply to the trip you actually want.
Why the advertised per-person fare misleads a solo cruiser
A cruise fare looks like a single-person price, but it is built on the assumption that two people share the cabin. The moment you book alone, the single supplement is applied — and because it is a percentage of the fare rather than a flat add-on, a sailing that looked competitive per person can become the dearest option once you are the only one paying for the room. Two cruises with near-identical headline fares can carry very different supplements, so comparing solo trips on the advertised per-person figure hides the number that actually matters to you.
How to work out your true cost
Start from the per-person fare for the sailing, then apply the single supplement for that specific cabin and date — anywhere from a modest uplift to effectively a second fare. Check whether a dedicated solo or studio cabin is available first, since it may sidestep the supplement entirely. Then add the per-guest costs that do not shrink for solo travel: gratuities across your nights, port taxes and any fees. Because the supplement varies so much by line, cabin and season, run a specific sailing through the TrueTotal calculator for a sourced, dated figure rather than guessing from the headline fare.
Honest by design
If you book through a partner link we may earn a referral fee at no extra cost to you, and it never changes which sailing we rank first or the figures we show — including how we treat the single supplement. Placement can't be bought; the order is decided by the true total and verifiable quality, never by who pays us. See our affiliate disclosure and methodology.
Rules of thumb only get you so far. Run a specific option through the calculator for a sourced, dated, confidence-graded figure.
Frequently asked
It is an extra charge for occupying a cabin alone. Cruise fares are priced assuming two people share, so a solo cruiser pays a supplement — typically a percentage of the per-person fare — to cover the revenue the line expected from the second berth.
It varies widely by line, cabin and sailing, but it is usually expressed as a percentage of the fare — often from around 25% up to 100% or more. At the higher end you are effectively paying two fares, so always check the supplement for your exact cabin and date.
Look for purpose-built solo or studio cabins, which carry little or no supplement but sell out early; watch for limited waived-supplement promotions; or consider a guaranteed-share programme where the line pairs you with another solo guest. Each has trade-offs, so weigh them against the true total.
Related guides
See the big picture in the Hidden-Fee Index — how much the advertised price hides across every category — or browse all buyer guides.
This guide explains typical, well-known cost mechanisms for general education — actual fees vary by operator, destination and date. Confirm live prices, fees and your consumer rights with the retailer and official sources before you buy. TrueTotal provides guidance, not financial or legal advice.