Landlord Tips

Common Area Electricity Billing: How to Split Shared Costs Fairly

July 20, 2026 · 5 min read

Room-level electricity is easy to bill once it's sub-metered. The kitchen, the lift, the corridor lights and the laundry area are where most PGs and apartments still argue. Here's how to fix that.

Sub-metering solves one problem, then reveals another

Once a property switches to individually sub-metered rooms, tenants stop arguing about who used what - each person sees their own usage and pays for exactly that. But the moment that argument goes away, a second one usually surfaces: what about everything else? The shared kitchen, the corridor lights, the lift, the laundry machines, the water pump - none of that runs through anyone's individual meter, and someone still has to pay for it.

What actually falls under "common area" load

In most PGs, co-living spaces and apartment blocks, the common area electrical load includes:

Shared kitchen appliances - refrigerators, water heaters, induction stoves or a common gas-backup exhaust in a mess-style kitchen.
Common laundry equipment - shared washing machines and dryers that aren't billed to any one room.
Corridor, staircase and gate lighting - always-on loads that scale with the size of the building, not with any tenant's behavior.
Lift and water pump/borewell motor - fixed infrastructure loads that run regardless of occupancy.
Security cabin and CCTV systems - typically low but constant draw.

None of these loads belong to a single tenant, which is exactly why they're the hardest part of the bill to divide fairly.

The usual ways owners handle it - and why each one causes friction

Most properties fall back on one of three approaches, and each has a predictable failure mode:

Folding it into rent. Simple to administer, but it hides the actual number. Tenants can't see what they're paying for, and owners can't tell if common-area consumption is creeping up over time.
Estimating a flat "maintenance" or "common charge" add-on. Better than folding it into rent, but the number is usually a guess carried over from the last owner or the last year, with no way to verify it against actual usage.
Splitting the full combined bill equally, rooms and common load together. This is the least fair option, because tenants using very little in-room power still subsidize whichever common-area equipment runs the most.

In every version, the underlying issue is the same: there's no metered, verifiable number for what the common areas actually consumed that month. Without that number, any split - equal, per-occupancy, or per-room-size - is really just an argument waiting to happen.

The fix: meter the common circuits separately, then split a known number

The structural fix isn't a smarter formula for splitting the bill - it's giving the split something real to work from. That means wiring the common-area circuits (kitchen, laundry, corridor lighting, lift, pump) through their own dedicated meter or meters, separate from each tenant's room-level sub-meter. Once that's in place:

The property owner sees exactly what the common areas cost each month - not an estimate carried forward from last year.
Tenants see the same number the owner sees. A dashboard showing "common area usage: X units this month" is much harder to dispute than a flat maintenance line item.
The split formula becomes a policy choice, not a trust problem. Whether you divide the common bill equally, by occupancy, or by room size no longer matters as much, because everyone is dividing a number they can verify rather than one they're asked to take on faith.

A simple example

Take a 12-room PG with a shared kitchen, laundry area and corridor lighting. Under sub-metering, each of the 12 rooms is billed individually through its own prepaid meter - tenants recharge and pay for exactly what they use. The kitchen, laundry and corridor circuits run through one additional common-area meter. If that meter reads 300 units for the month at the prevailing tariff, the owner has one clean number to divide - say, equally across 12 rooms as a fixed monthly common charge, added to each tenant's recharge reminder. No estimation, no carryover guesswork, and no argument about whether the number is real.

Setting this up on an existing property

Adding common-area metering alongside room-level sub-metering doesn't require rewiring the whole building. In practice:

Circuit mapping. Identify which loads are room-level and which are shared - kitchen, laundry, lift, pump, corridor and gate lighting typically get grouped onto one or two common meters.
Installation. Aliste's team installs the common-area meter(s) alongside room meters in the same visit, usually within 12 hours, without disrupting tenants.
Policy, not hardware. Once the number is metered, the owner decides how to split it - equally, by occupancy, or by room size - and that split is communicated to tenants as a fixed line item alongside their individual recharge.

This is the same infrastructure Aliste already runs at scale, just extended to cover the circuits that don't belong to any single room.

Frequently asked questions

What counts as a common area electrical load in a PG or apartment?

Anything not billed to a single room or unit: shared kitchen appliances, common washing machines, corridor and staircase lighting, lift, water pump or borewell motor, security cabin, and any backup or generator load feeding shared spaces.

Should common area electricity cost be split equally or by room size and occupancy?

Once the common load is metered separately, you can split that single, known number however you choose - equally per room, by occupancy, or by unit size - because the dispute was never really about the formula, it was about not trusting the total. A metered total removes that distrust regardless of which split you use.

Can a property have both individually sub-metered rooms and a separately metered common area?

Yes, and this is the standard setup. Each room or unit gets its own prepaid sub-meter, and the common circuits (kitchen, laundry, lift, corridor lighting, pump) are wired through one or more separate meters billed to the property owner or split among tenants as a fixed common charge.

Does metering common areas separately add much cost or complexity?

Not meaningfully. It's typically one or two additional meters for the whole property, installed at the same time as room-level metering, and covered under Aliste's zero-upfront-cost model - it doesn't scale with room count the way per-tenant metering does.