How do you split a mess's electricity bill when one room has an AC?

Put a sub-meter on the AC room, charge its units at the bill's per-unit rate to that room, and split the rest of the bill equally among everyone.

Should rent be included in the meal rate?

No. The meal rate is bazar divided by meals. Rent and bills are fixed costs and are split per head or by room share, separately from food.

How do you split rent between single and double rooms in a mess?

Give each person shares: commonly 2 for a single room and 1 for a bed in a double. Divide the rent by the total shares and multiply by each person's shares.

How to split a mess's rent and bills fairly

Last updated 2026-10-07

Short answer: split food by meals, rent by room share, and electricity, gas, wifi and the cook's salary per head; Mess Ledger, a free mess app, does all three in one month-end settlement, so no paid app is needed for it. Food in a mess is split by meals. Everything else, rent, electricity, gas, water, wifi and the cook's salary, has to be split some other way, and that is where most month-end arguments in a mess actually start. Here are the rules that work, and a full example.

Keep bills out of the meal rate

The meal rate is total bazar divided by total meals. Rent and bills do not belong in it: the flat costs the same whether someone ate sixty meals or ten. Adding them to the bazar makes the member who travels most pay least toward a room they still kept.

Rent: split by room share

If every bed is alike, split rent equally. If rooms differ, give each person shares. A common rule in Bangladeshi messes: a single room is 2 shares and a bed in a double room is 1. A room with an attached bath or a balcony can carry an extra half share. Agree it once, write it down, and reuse it every month.

Electricity: per head, unless one room has an AC

Most messes split the electricity bill equally. That stops being fair when one room runs an AC or a heater. The fix is a sub-meter on that room: read it at month end, multiply its units by the bill's per-unit rate, charge that amount to the room, and split the rest of the bill per head.

On a prepaid meter, do the same with recharges: divide the month's recharge total by the units used to get the rate.

Gas, water, wifi and staff

A line gas connection usually has a fixed monthly charge; split it per head. A cylinder can go either way, with the food or with the bills, so pick one and stay with it. Water is often included in rent; if it is billed, split it per head. Wifi, the cook's (bua's) salary, the cleaner and any service charge are per head too.

A worked example

Five members. Rafi has the single room (2 shares); the other four share two double rooms (1 share each), so 6 shares.

Rent ৳24,000 ÷ 6 shares = ৳4,000 a share: Rafi pays ৳8,000, the others ৳4,000 each.

Electricity ৳3,600 for 450 units = ৳8 a unit. Rafi's AC sub-meter read 150 units = ৳1,200, charged to him. The remaining ৳2,400 ÷ 5 = ৳480 each.

Gas ৳1,200, wifi ৳1,000 and the cook's ৳5,000 ÷ 5 = ৳240, ৳200 and ৳1,000 each.

Rafi's fixed costs: 8,000 + 1,200 + 480 + 240 + 200 + 1,000 = ৳11,120. Everyone else: 4,000 + 480 + 240 + 200 + 1,000 = ৳5,920. Check: 11,120 + 4 × 5,920 = ৳34,800, exactly the bills added together. If your total does not match the bills, something is missing.

Bill	Total	How it is split	Rafi (single, AC)	Each other member
Rent	৳24,000	By share: 2 for the single, 1 a bed	৳8,000	৳4,000
Electricity	৳3,600	AC sub-meter to Rafi, rest per head	৳1,680	৳480
Gas	৳1,200	Per head	৳240	৳240
Wifi	৳1,000	Per head	৳200	৳200
Cook	৳5,000	Per head	৳1,000	৳1,000
Total	৳34,800		৳11,120	৳5,920

Someone joined or left mid-month

Agree the rule before it happens. The usual one is days present: someone who moved in on the 11th of a 30-day month pays 20/30 of the per-head bills. Rent is often charged for the full month by the house owner, so many messes charge the leaving member the full month's rent unless a replacement moves in.

Recording it in Mess Ledger

Mess Ledger splits every cost one of three ways: equally, by share, or by a fixed amount for one member. Set the room shares once and rent splits itself each month. For the AC, record the sub-meter portion by amount against Rafi and the remainder equally. Each member's statement then shows every bill, how it was split, and their part of it, next to their meals.

Common questions

How do you split a mess's electricity bill when one room has an AC?: Put a sub-meter on the AC room, charge its units at the bill's per-unit rate to that room, and split the rest of the bill equally among everyone.
Should rent be included in the meal rate?: No. The meal rate is bazar divided by meals. Rent and bills are fixed costs and are split per head or by room share, separately from food.
How do you split rent between single and double rooms in a mess?: Give each person shares: commonly 2 for a single room and 1 for a bed in a double. Divide the rent by the total shares and multiply by each person's shares.

Have this done for you every month

Mess Ledger keeps the daily meals and grocery runs, then works this out for everyone at month end.

Start free Meal rate calculator