The Maison Emerald Half-Rate Rule
A decision tool for paid hotel upgrade offers: an offer at roughly half the nightly rate difference between the booked and offered categories is good value — measured against real selling rates, not rack figures.
The benchmark: half the difference
A paid upgrade is good value at roughly half the nightly rate difference between the category you booked and the category offered.
Measure against real selling rates
Compare against what the two categories are actually selling for tonight, not the rack rate. The rack difference flatters almost any offer.
The boundary
Above the half-rate line, you are paying close to full price for unsold inventory. Below it, the hotel is genuinely sharing the value of a room it would not otherwise sell.
Last reviewed
Paid upgrade offers — at check-in, by email before arrival, through an app — are one of the few upgrade routes a guest can act on directly, which makes them the one worth a rule of thumb. The Half-Rate Rule is that rule: a paid offer is good value at roughly half the nightly rate difference between the room you booked and the room on offer.
The logic is the hotel’s own. The room being offered is, by definition, one the hotel has not sold; its marginal cost to the property is small, so a price that shares the upside between guest and hotel sits somewhere around half the gap. At that level, both sides gain. Below it, the guest is getting a genuine share of the value of unsold inventory. Above it — as the price climbs back toward the full category difference — the guest is simply paying near-retail for a room that would otherwise have stayed empty, and the offer has stopped being an upgrade in any meaningful sense.
The measurement that matters is against real selling rates, not rack figures. The published difference between a room and a suite can be enormous and largely fictional; what the two categories are actually selling for tonight is the only honest denominator. An offer that looks generous against rack can be poor against reality, and the rule only works when the comparison is real.
Like the house’s other operational models, this is judgement rather than a promise. It does not predict what any particular hotel will offer, and it does not apply to the unpaid routes an upgrade can travel — those are governed by the Upgrade Probability Framework. It simply tells a guest, when a number is put in front of them, which side of the line it falls on.