Giving a discount on the bill
The folio's fourth tab: a percentage or an amount off the whole bill, the room, the food, or one line — with the GST reduced to match, a reason, and a name on it.
"Ten per cent off for a returning guest." "Take ₹500 off the room, the AC was noisy." The restaurant has had this since the till was built; the room bill had only a void (the charge was wrong — the whole line goes) and, since September, a waiver of a small leftover at the door. Now it has the same fourth tab the restaurant has.

Do this
- Open the Folio and press Give a discount. The tab is there while the bill is open and your login may discount.
- What it is on — the whole bill, the room, food & beverage, everything else, or one line — each with what is on the bill under it right now.
- A percentage or a rupee amount, not both.
- The reason, from the hotel's own list (the same list the restaurant picks from; add to it on Lists & reasons).
- Approved by — yourself, up to the hotel's limit; above it, a manager's name from the list.
- Give the discount. It lands as an allowance beside the charges, one per tax slab it touches, with the reason and the name in the description and on the booking's history.
The tax follows the discount
A discount given on the bill before the invoice is issued reduces the value of supply, so each allowance carries its GST back at the rate of the charges it reduces — the guest pays tax on what they actually pay, and the GST return files what the invoice printed. This is the opposite of the waiver at the door, which is a goodwill reduction after the supply and carries no tax. A discount across the whole bill is shared over the slabs it touches in proportion: ₹500 off ₹4,000 of room at 5% and ₹1,000 of laundry at 18% is ₹400 off one and ₹100 off the other, each with its own tax. The room's slab is not re-read: a ₹8,000 room with ₹1,000 off is still billed at the slab its tariff put it in.
The limit
On Hotel details: the share of a bill the desk may discount on its own, 0 until the account administrator raises it — which means a manager's name on every discount until then. Above the limit the tab asks for the manager; a login that is not one is refused in a sentence: *A discount of 15 per cent needs a manager; this hotel lets the desk give 10 per cent without one.*
What it is not
A room price for the nights still to come is a rate change, done from the card's Rate button, which moves the GST base at source; the tab says so when there is nothing under Room yet (the night is not on the bill until the audit or the check-out posts it). A discount already given is undone by a manager voiding the allowance lines; the record of the decision stays.