How to reduce electricity bill at home: 12 fixes ranked by rupees saved

If you are looking for how to reduce electricity bill at home, the usual advice (“switch off lights”, “use natural light”) saves very little in an Indian home. Most of the bill comes from three things: cooling, water heating and the fixed charges on your connection. This guide ranks twelve fixes by the rupees they save each month for a typical home, with the working shown, so you can start with the ones that matter.

How to reduce electricity bill: 12 fixes ranked by rupees saved

To see how your own home compares, list your appliances in the home load calculator, or convert any appliance’s watts and hours into units and rupees with the electricity unit calculator.

Save electricity on cooling, where most summer bills come from

A 1.5 ton AC running eight hours a night uses roughly 250 to 300 units a month, often more than everything else in the house combined. The setting matters more than the brand. The Bureau of Energy Efficiency estimates that each degree higher saves about 6% of an AC’s power, so moving from 20°C to 24°C cuts about a quarter: roughly 70 units, or ₹550 a month. Run a ceiling fan with it and 24 to 26°C feels as cool as 20°C did. The government proposed in 2025 to limit new AC settings to between 20°C and 28°C.

• Clean the AC filter every two weeks in summer; a clogged filter can add 5 to 15% to power use.
• Close curtains on sun-facing windows in the afternoon.
• Use sleep or timer mode so the AC eases off in the early morning.
• Replace a 10-year-old fixed-speed AC with a 5-star inverter model only when it needs major repair; the saving alone takes years to pay back.

Fans and lights: small numbers that add up

A regular ceiling fan draws about 75 W at full speed; a BLDC fan draws about 28 W. Four fans running 14 hours a day save roughly 80 units a month, about ₹630. BLDC fans cost ₹3,500 to ₹4,500 each, so they pay back in about three years of fan seasons. Start with the fans that run longest, usually the bedrooms.

Lighting is now a small part of most bills. If you still have 40 W tube lights, four LED tubes save about 16 units a month. Beyond that, lights are not where the money is.

Water heating: the winter bill

A 2 kW geyser heating for 90 minutes a day uses about 90 units a month. Set its thermostat to around 50°C instead of the maximum, and use a timer so it heats only before baths instead of all morning. Cutting heating time by half an hour saves about 30 units, roughly ₹240 a month in winter. A solar water heater removes most of this cost if you have the roof space and sun.

Fixed charges and sanctioned load

Your bill has a fixed charge for every kW of sanctioned load, payable even if you use nothing. Many homes are sanctioned for 7 or 8 kW from the day they were built, but never draw more than 3 or 4 kW. If your maximum demand on the bill or smart meter is well below your sanctioned load, ask your DISCOM to reduce it. At ₹100 to ₹125 per kW a month, dropping 3 kW saves ₹300 to ₹375 every month with no change in comfort. How maximum demand is recorded is explained in smart meter reading.

Check your slab too. Most states charge more per unit as monthly use rises. If you sit just above a slab boundary, the last 50 units cost you more than the first 50, so cuts there save more than the average rate suggests.

Hidden users: the old inverter and standby power

A home inverter and battery are always on, keeping the battery charged and powering their own electronics. An older inverter can use around a unit a day even when there is no power cut, which is about ₹200 a month. If cuts are rare in winter, switch the inverter off at the mains and back on for summer, or replace an old unit with an efficient one; see our solar inverter guide if you are choosing a new one.

TVs, set-top boxes, speakers, microwaves and chargers left on standby typically draw 15 to 25 W together, around 15 units a month. A switched power strip behind the TV fixes most of it.

Tariff tricks: ToD and timing

Homes with smart meters are moving to time-of-day tariffs, where units in solar hours are cheaper and evening peak units dearer. Running the washing machine, water pump and geyser between about 10 am and 4 pm saves 10 to 20% on those units. The gain is small for most homes today but grows as more states apply ToD to households.

Check the bill itself

• Bills marked “average” or “estimated” instead of an actual reading.
• A sudden jump in units with no change in use; test the meter as shown in smart meter reading.
• The wrong category, such as commercial instead of domestic.
• Arrears or late fees from a previous owner or tenant.
• A sanctioned load or MD penalty you were not told about.

When rooftop solar makes sense

Every fix above trims the bill. Solar replaces most of it. A 3 kW rooftop system makes about 360 units a month, worth about ₹2,900 at ₹8 a unit, and costs about ₹1.5 lakh after the ₹78,000 PM Surya Ghar subsidy. With net metering, daytime surplus covers your evening use. It makes most sense once your bill is above about ₹1,500 a month and you have around 300 sq ft of shade-free roof. See the full cost on 3 kW solar system price.

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