CruiseStar
A few weeks after you book a cruise, an email lands with a subject line that feels like a lottery ticket: bid for a stateroom upgrade. You name your price for a balcony, a suite, or a grand loft, and if the cruise line accepts, you sail in a room that would have cost far more at booking.
That email comes from a real program, not a gimmick. Most major lines now run blind-auction upgrade bidding, and the mechanics are strikingly similar across brands. Here is how the auction works, what the rules are, and how to bid without overpaying.
Royal Caribbean
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Which lines run a bidding program
These are the official names you will see in your inbox:
- Royal Caribbean: RoyalUp
- Celebrity Cruises: MoveUp
- Norwegian Cruise Line: Upgrade Advantage
- Azamara: Azamara Upgrade
- MSC Cruises: MSC UpGrade
- Princess Cruises: Princess Upgrade
Most of these run on the same underlying technology from a company called Plusgrade, which powers upgrade auctions across the cruise industry. The branding changes, the auction logic does not: it is a blind auction, which means you cannot see what anyone else is bidding.
How the bidding actually works
It runs as a short sequence, and almost every line follows the same script:
1. You get invited. After your booking is paid up, eligible guests receive an email inviting them to bid. Invitations depend on the sailing: lines open bidding on sailings that have not sold out, and they can prioritize loyalty members, the fare you paid, and how many cabins sit empty. Royal Caribbean also lets you check your own eligibility on its RoyalUp portal with your last name and reservation ID.
2. You browse the upgrade categories. The invite shows which stateroom categories above your booked cabin are open for bidding, from an oceanview step-up all the way to top suites. You bid only on the categories you actually want.
3. You set a per-person bid. Every bid is priced per person, based on the first two guests in the cabin, for the entire cruise. On Princess, for example, the first and second guests are charged the bid amount each, third and fourth guests ride along with no extra upgrade charge, and solo travelers are charged 200 percent of the bid.
4. You watch the strength meter. Royal Caribbean shows a slider with a strength indicator that shifts from weak toward strong as you raise your offer. Treat it as a rough guide only. Guests report winning with weak bids and losing with strong ones.
5. You wait. An accepted bid can arrive at almost any point, from shortly after you submit right up until close to departure. Royal Caribbean notes bids can be accepted up to two days before the sail date, and Princess lets you change or cancel an unaccepted bid until one day before departure.
6. You are charged only if you win. Your card is not charged when you submit. If a bid is accepted, the charge is immediate and non-refundable. If nothing lands, you keep your original cabin at no cost.
The rules that matter most
Before you type a number, know what you are signing up for:
- The bid is per person, not per cabin. A $200 bid means $400 for two guests, for the whole sailing, not per night.
- Accepted bids are non-refundable. Once the line accepts, you cannot change your mind, switch cabins, or get the money back.
- You do not pick the exact cabin. Winning puts you in the new category, but the deck, cabin number, view angle, and proximity to your traveling companions are the line's choice. A suite directly under a noisy venue is still a suite.
- You can adjust until the last stretch. Bids can usually be modified or canceled until they are accepted or close to departure, so an early bid is not a locked bid.
- You will only ever win one. You can bid on multiple categories to raise your odds, but you will only ever win and pay for a single upgrade.
A bidding playbook that actually works
1. Price the category before you bid. This is the whole game. Look up what your target category would have cost outright, subtract what you already paid, and never bid above that gap. The system can accept bids that exceed the room's real value, and nothing stops a bidding-war instinct from doing the line's job for it. Set your ceiling before you open the slider.
2. Decide what the upgrade is worth to you, then subtract a margin. Because the cabin location is the line's choice, value the category, not the fantasy corner balcony. If a suite only matters to you with a good location, lower the bid or skip it.
3. Bid only on rooms you would happily live in. Every category you bid on is a category you could win. If a particular suite type holds no appeal, leave it out, even if the minimum looks tempting.
4. Bid early, adjust late. Minimum bids can soften as a sailing's inventory finalizes in the last days before departure, and cabins open up through last-minute cancellations. There is no penalty for entering early and editing later.
5. Sail when the ship is less full. Upgrade odds are best on sailings with spare capacity: off-season dates, repositioning cruises, and shoulder-season itineraries. MSC's transatlantic repositioning sailings are a frequently cited example of upgrade-rich inventory because ships sail with lower occupancy. Bidding costs nothing to attempt on a packed sailing too, but keep expectations honest.
6. Make sure you get the email. Invites go out by email, so opt in to the cruise line's marketing messages. No email, no auction. For Princess, timing is published: bidding opens 85 days before sailing for voyages of 1 to 24 days, and 115 days before for voyages of 25 days or more. The booking generally must be paid in full and the guest must be at least 21.
What bidding will not do
It will not turn your cruise into a negotiation, and it will not guarantee anything. The smartest framing, borrowed from seasoned sailors: be happy with the cabin you booked, and treat any upgrade as a bonus. If you would be disappointed staying put, you booked the wrong cabin, not the wrong bid.
Free upgrades still exist in the wild, but they are rare and mostly loyalty-adjacent: top-tier members on overbooked sailings, or guarantee-category cabins bumped when their booked category sells out. Booking a guarantee cabin in a category that fills up is one of the more reliable paths to a complimentary bump, but only if you are comfortable giving up control of your exact deck location.
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Pick the ship first, then bid on the room
Bidding is a pricing tool, not a planning tool. The ship you sail decides the crowd, the entertainment, the dining, and the quiet corners. If you have not chosen yet, run the first-cruise ship finder and compare contenders with the ship comparator before you let any auction email pick your priorities.
Won an upgrade, or watched your bid quietly expire? Rate the ship when you get home so the next sailor bidding blind has real numbers to go on.