The cheapest rate on a booking screen is often the one that charges you for changing your mind. That can be the right rate when the flights are paid and the dates are fixed. It is the wrong rate when you are still “pretty sure” about the weekend. Read the policy as a set of dates and amounts, not as a badge that says flexible.
Find three facts before you enter a card. First, the deadline: the exact local time after which the free cancellation dies. Second, the penalty: one night, half the stay, or the whole prepaid amount. Third, whether taxes and the last night are included in that penalty. “Free cancellation until 48 hours before arrival” is meaningless if you do not know which clock, and expensive if your plans fail on the wrong side of it.
Compare the real price
A non-refundable room that is ten percent cheaper is a bargain if you will be there. It is a fee if you might not. For the first and last nights of a complex trip, and for any town with a festival, a refundable rate is often the cheaper one once you admit uncertainty. You can usually tighten later — cancel the flexible booking and rebook a stricter rate — if the savings are still available. You cannot always loosen a prepaid stay because you found a nicer street.
Watch the prepayment line separately from cancellation. Some rates charge the card today and still allow a refund until a date. Some charge at the hotel and still penalize a late cancel. Those are different cash positions. If you are using a debit card, the difference matters more.
What to save
Keep the confirmation that states the policy, not only the pretty email. If you cancel, do it through the same channel you booked and save the cancellation number. Hotel policies at independent inns and ryokan are often stricter than chains, and apartments may say “strict” when they mean the entire stay after a short grace period. None of this requires fear. It requires reading the three facts while the other tab, the one with the cheaper rate, is still open.