Calculate savings on longer stays.
Length-of-stay discounts are stepped rather than gradual: the weekly rate applies from seven nights and the monthly rate from twenty-eight, with nothing in between. That creates hard thresholds worth planning around — booking six nights forfeits the weekly discount entirely, and a seventh night can cost less than nothing once the discount applies to all seven. Fixed fees behave in the opposite direction, being spread thinner the longer you stay. The effective cost per night, which combines both effects, is the only figure that lets you compare stays of different lengths honestly.
Applied discount
Monthly rate at 28+ nights, weekly rate at 7-27 nights, none below 7
Effective nightly
Effective = (discounted nightly x nights + fixed fees) / nights
Yes, and it is common. If a 12 percent weekly discount kicks in at seven nights, it applies to all seven, not just the extra one. On a 130 rate that saves about 109 across the stay while the extra night costs 114 discounted — so the seventh night is nearly free.
Because it is the only figure that accounts for both the discount tier and the fixed fees spread across the stay. Comparing advertised nightly rates between a five-night and a fourteen-night booking tells you very little, since the fee weight and discount tier differ in opposite directions.