The single supplement, explained — and the three ways around it.
A single supplement is the extra charge a cruise line adds when one traveler takes a cabin built and priced for two. Where lines publish a number, it runs 175 to 200 percent of the per-person fare — close to paying for an invisible companion. It isn’t a penalty for being alone; it’s the line protecting revenue on a two-berth room. And it is far more avoidable than the booking sites make it look.
What “200%” actually does to a fare.
Take a cabin advertised at $1,000 per person, double occupancy. A couple pays $2,000 and splits it. A solo traveler at a 200% supplement pays the same $2,000 — alone. At Cunard’s published 175%, the solo fare is $1,750. At Royal Caribbean’s loyalty-reduced 150%, it’s $1,500. Taxes, port fees, and gratuities are usually per person, which softens the doubling a little — but the fare itself is the battle.
Now the part the listicles skip: a dedicated solo cabin reprices the whole question. A studio priced for one at $1,300 beats the $2,000 supplement path by $700 — but on a high-demand week, that same studio can float abovea standard inside cabin’s solo price. Solo travelers on the forums discovered this at checkout and canceled. The lesson isn’t “studios are a trap”; it’s that three prices exist for every solo sailing, and only a live comparison tells you which one is yours.
“Three prices exist for every solo sailing, and only a live comparison tells you which one is yours.”
The 30-second fit-finder narrows every solo line to the one built for your week.
How to avoid the single supplement: the three ways that actually work.
Book a cabin priced for one
Norwegian carries nearly a thousand solo staterooms across its fleet; Celebrity built verandas for one on its Edge-class ships; Royal Caribbean, MSC, Holland America, Cunard, and Princess all carry some. No supplement applies — the catch is inventory, which sells first. The full ship-by-ship list is here.
Book a sailing where the supplement is waived or cut
Strongest on river and luxury lines: Tauck waives it outright in Category 1 on every 2026 European river departure, Uniworld and AmaWaterways run dated waiver and 10% offers, Crystal holds select voyages at 25%. These offers carry deadlines and category fine print, which is why we keep a dated tracker rather than an evergreen list.
Use the levers: loyalty, timing, flexibility
Royal Caribbean contractually drops the supplement to 150% — 125% on ocean crossings — for its highest-tier loyalty members. Shoulder-season and repositioning sailings price solos more gently. And flexibility is its own currency: travelers who can move a week often find the sailing where the math flips. These are exactly the levers an advisor pulls before quoting you anything.
The $99 deposit, and what follows.
You don’t pay for a cruise all at once. For most sailings beyond 90 days out, a deposit (often $99 to $250) holds your cabin for one and locks in the fare. The balance isn’t due until final payment date, typically 90 to 120 days before sailing.
Many lines also natively offer 0% installment plans or partner financing (like Royal Caribbean with Affirm, or Carnival EasyPay). We’ll tell you exactly what payment structure applies to your sailing before you decide.
“Can I just book for two and show up alone?”
The forums call it the ghost-companion booking, and since nobody official will answer it, we will. Booking a double for two and sailing alone is generally permitted: the second guest no-shows, their port taxes and government fees are typically refunded, and their fare typically isn’t. On promo structures where the second guest sails at a deep discount, the all-in cost can occasionally undercut a formal solo booking.
Occasionally — not usually. It complicates travel insurance, it can wrinkle online check-in, and on most sailings a real solo path prices better once everything is counted. It’s a fair question with an honest answer: we’ll run both numbers for your sailing, and book whichever one is actually yours.
Verified 2026-06-10 against the lines’ official pages · Reviewed by Guennadi, CLIA-accredited NestCruise advisor · CLIA #00592834
Found your sailing? Don’t deposit yet.
Paste the sailing link or your booking number. Guennadi, our CLIA-accredited advisor, reads the solo math — the cabin for one, the supplement on a double, whatever offer is live — in writing, complimentary, before you commit a dollar. And if booking direct wins, we’ll tell you that too.
The supplement is a question. We’re the answer key.
Send the sailing you’re eyeing. Guennadi, our CLIA-accredited advisor, prices the cabin for one, the supplement path, and the live offers — in writing, complimentary.
Price my solo sailing