MEPCO Bill Calculator — Work Out Your Bill From Units

Your MEPCO bill is your units multiplied by one slab rate, plus a fixed charge tied to your sanctioned load, plus the monthly adjustment lines, with GST applied over the total. Enter your units below and each part is itemised separately, so you can set the result beside your own bill and see exactly where the two differ.

The formula MEPCO actually applies

Bill = (Units × slab rate) + Fixed Charge + FPA + QTA + surcharges + GST + Income Tax + arrears − subsidy

Most calculators compute the first term and stop. That term is usually less than two-thirds of what you pay, which is why an estimate of Rs 4,000 arrives as a bill of Rs 6,200 and people assume they have been overbilled.

The calculator above itemises every term. Fill in the adjustment fields from your last bill and the estimate lands within a few rupees.

Which slab rate applies

Base rates notified for the current tariff year, per unit:

Category	Slab	Rate
Lifeline	Up to 50 units	Rs 3.95
Lifeline	51–100 units	Rs 7.74
Protected	1–100 units	Rs 10.54
Protected	101–200 units	Rs 13.01
Non-protected	1–100 units	Rs 22.44
Non-protected	101–200 units	Rs 28.91
Non-protected	201–300 units	Rs 33.10

Above 300 units the rate climbs through further bands. Your bill prints the rate actually applied in the Rate column beside your units, and the calculator has a field to enter it directly.

Two things decide your rate, not one. The units you used, and the status attached to your connection. Status is historical — it reflects the last six months, not this month. Two neighbours consuming 180 units each can pay Rs 13.01 and Rs 28.91 for the same electricity because one of them ran the air conditioning hard in June.

The fixed charge, and why estimates from last year no longer work

Until early 2026, a domestic bill was consumption only. In February 2026 NEPRA moved domestic consumers onto a two-part tariff, combining a variable energy charge with a fixed monthly charge based on sanctioned load in kilowatts. Lifeline consumers up to 100 units stayed exempt. Consumers in the 101–200 band saw roughly Rs 200–300 per kW per month added, and those between 201 and 400 units around Rs 350–400 per kW per month.

The trade was a lower per-unit rate against a higher standing charge. In the K-Electric schedule published alongside the decision, the 301–400 band fell from Rs 37.99 to Rs 36.46 per unit while the fixed charge doubled from Rs 200 to Rs 400.

Sanctioned load is printed on your bill under Consumer Detail, usually 1 kW to 5 kW on a house. It is your permitted capacity, not your usage, so the charge lands whether you are home or away for the month. If your sanctioned load is higher than anything you actually draw, a load reduction application at your Sub-Divisional Office lowers this line permanently.

Why the adjustment lines never match the month you are calculating

Fuel adjustment reaches your bill roughly two months after the electricity was generated. The May 2026 fuel charge adjustment of Rs 0.3364 per unit was notified on 9 July 2026 and applied to July 2026 billing, replacing the Rs 1.19 per unit carried in June.

So the figure sitting on the bill in your hand describes fuel prices from two months ago. That is why a calculator using this month's published adjustment drifts from reality, and why the field above is left for you to fill from your own bill instead.

Quarterly adjustment behaves differently again. A quarterly relief of about Rs 1.99 per unit applied across June, July and August 2026 — one figure held for three billing cycles, then replaced.

A worked example

A non-protected household, 3 kW sanctioned load, 250 units.

• Energy charge: 250 × Rs 33.10 = Rs 8,275
• Fixed charge at Rs 350/kW: 3 × 350 = Rs 1,050
• Fuel adjustment: 250 × Rs 0.3364 = Rs 84
• Quarterly adjustment: 250 × −Rs 1.99 = −Rs 498
• Subtotal: Rs 8,911
• GST at the rate on your bill, then income tax, then any arrears

The energy charge alone reads Rs 8,275. The bill lands well above it. Nothing has gone wrong.

Making your estimate agree with your bill

When the two differ, work through this order.

• Check the units first. Present reading minus previous reading, then multiplied by the multiplying factor printed under Meter Info. On most domestic meters that factor is 1, but where it is not, your billed units are not the difference between the two readings.
• Check the rate column. If the rate printed on your bill differs from the slab you expected, your status has changed. That is the whole answer, and no adjustment to the calculator will close the gap.
• Check whether the cycle was a full month. A reading date more than a few days from the usual one means the billing period was short or long, which moves you between slabs without your consumption changing.
• Check for arrears. An unpaid balance rolls into the current bill and inflates the total against any estimate.

If the units are right, the rate is right, the cycle is normal and the total is still far out, the difference is on a charge line rather than in the calculation.

Converting appliances into units

Units are kilowatt-hours. Watts × hours ÷ 1000 = units.

A 1.5-tonne air conditioner draws around 1,500 watts. Run it eight hours a night for thirty nights and that is 360 units on its own — enough by itself to move a household out of the protected category.

• Ceiling fan, 75W, 12 hours daily: about 27 units a month
• Refrigerator, 200W, running roughly half the time: about 72 units
• Water pump, 750W, one hour daily: about 22 units
• Iron, 1000W, three hours weekly: about 12 units
• LED bulb, 12W, six hours daily: about 2 units

Add your own list before assuming a bill is wrong. Households routinely underestimate cooling load by half.

What the 200-unit line is actually worth

Consider 200 units billed two ways. At the protected rate of Rs 13.01 the energy charge is Rs 2,602. At the non-protected rate of Rs 28.91 for the same band it is Rs 5,782.

That is Rs 3,180 a month, on identical consumption. A consumer who crosses the threshold must then spend six months outside the protected category before regaining the status, so a single heavy month costs somewhere near Rs 19,000 across the half-year that follows, before fixed charges and GST.

Run the calculator at 195 units and again at 205. The gap between those two results is the real price of the last ten units, and it is the strongest argument for watching your meter in June and July rather than reading the bill in August.

FAQ