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SEPCO bill estimate calculator guide

You can estimate next month's SEPCO bill before it arrives with three numbers: units used (from your meter), an approximate per-unit rate taken from your last bill, and last bill's tax total. The calculator at the top of this page (also on the homepage) multiplies and adds them for you.

Step 1: gather the three inputs

1. Units. Read your meter today and subtract the "present reading" printed on your last bill. That difference is the units consumed since the last billing date. Do it mid-cycle and double it for a rough full-month figure, or wait until your usual reading date for a tighter one. What a unit means is covered in units meaning.
2. Per-unit rate. Do not guess a tariff. Take your last bill and divide its total energy charges by its units — that gives your own blended rate, which already averages the slab structure for your consumption level. If your usage this month is similar, it is a good proxy.
3. Taxes and fees. Copy the combined taxes, duties, and fees total from the last bill as-is. Tax lines move less month to month than energy charges, so last month's figure is a workable proxy (breakdown in taxes explained).

Step 2: run it through the calculator

The tool's default numbers show the arithmetic. With 245 units at an approximate rate of PKR 32 per unit, energy charges come to 245 x 32 = PKR 7,840. Add the example tax total of PKR 850 and the estimate is roughly PKR 8,690. Swap in your own three numbers — the defaults are placeholders, not SEPCO tariff figures, which you should always take from your own bill or the latest NEPRA-approved tariff.

Enter your 14-digit reference number too and the tool checks its format and builds a printable summary card, which is handy as a personal record while you wait for the real bill.

Why the estimate will not match the real bill exactly

• Slab jumps. Your blended rate came from last month's consumption level. If you use noticeably more units this month, the extra units are priced in higher slabs, so the real bill lands above the estimate. Crossing 200 units matters most — it can move a domestic connection off protected rates. See charges explained for the slab mechanics.
• FPA changes. The fuel price adjustment is recalculated every month and can even be negative, so it shifts the total in either direction.
• Quarterly adjustment and one-off lines. A new quarter's adjustment or an arrears line will not be in your proxy numbers.
• Reading-date drift. The meter reader's visit date varies by a few days, so the billed units rarely equal your self-measured units exactly.

A five-minute monthly habit

Read the meter on the same date each month, estimate, and note the result. Two things follow: bills stop being surprises, and when a real bill lands far outside your estimate you catch it immediately — either your usage spiked or the billed reading is off, and reading the bill line by line tells you which.