Bill Auditor
Check Your Bill
We calculate the complete correct amount — energy charge plus 7.5% VAT — then compare against what you paid.
How prepaid overcharge works: When you buy a token, the kWh units credited should match the NERC-approved rate for your band. Enter what you paid and what was credited — we'll show if you were shortchanged.
1Your Supply Details
Please select your DisCo
Please select your tariff band
Please select your customer type
NERC energy rate: —/kWh · 13/05/2026
2Token Purchase Details
Please enter the amount you paid
Please enter the units credited
Expected Correct Bill
Energy Charge—
Fixed Charge (monthly)—
RERF Levy (2%)—
VAT (7.5%)—
Total You Should Pay—
3Your Details (optional — personalises dispute letter)
You Paid
—
Correct Amount
—
Difference
—
How We Calculated Your Correct Amount
Energy (— kWh × —)—
Fixed Charge (monthly)—
RERF Levy (2%)—
VAT (7.5%)—
Total Correct Amount—
⚠️ Possible Band Mismatch: You reported hrs of supply but Band guarantees hrs/day. You may qualify for a reclassification — include this in your dispute letter.
Token Calculator
How many units should I get?
Know exactly how many kWh your money should buy — before you purchase a token.
Please select your band
Please select your type
Please enter a valid amount
NERC approved rate: —/kWh
—
kilowatt-hours (kWh) you should receive
Amount Paid
—
Your token budget
NERC Rate
—
Per kWh approved
If 10% Overcharged
—
kWh you would lose
⚠ Note: This estimate covers energy charge only. DisCos deduct fixed charges and VAT before crediting units on prepaid meters, so your actual credited units may be slightly lower. Always cross-check with your meter receipt.
💡 If your meter credits fewer units than shown, use the Bill Auditor above and generate a dispute letter. Screenshot this result as evidence.
Band Finder
Don't know your band?
Search your street or area name — we'll show your NERC tariff band instantly. Covers 317 areas across Lagos.
Type your street, estate, or area — e.g. "Ipaja", "Allen", "Gbagada". Or tap ▼ to browse all areas.
——
How it Works
Three steps. No jargon.
01
Enter your details
Tell us your DisCo, band, and meter type. Use Band Finder if you're unsure of your band.
02
We do the full math
We calculate your energy charge at the NERC-approved rate and add 7.5% VAT — then compare against what you actually paid.
03
Fight back
If overcharged, generate a personalised dispute letter and send directly via email to your DisCo (or WhatsApp where available), or download as a printable document.
FAQ
Common Questions
Everything you need to know before using WATT?
NERC divides customers into five bands (A–E) based on daily supply hours. Band A = 20–24 hrs, Band E = 4–8 hrs. Your band is printed on your postpaid bill. Prepaid customers should check with their DisCo or use our Band Finder tool above. You can also call your DisCo's customer care line.
Your electricity bill includes the energy charge (units × approved rate) plus 7.5% VAT. Fixed charges and RERF levy are already embedded in the per-unit rate depending on your payment platform. WATT? adds VAT on top of the energy charge to give you the true correct amount. If your DisCo charged more than this, that is a disputable overcharge.
Overcharging on prepaid meters happens when you buy a token. If the vending system applies an effective rate higher than NERC's mandate for your band, you receive fewer units than you should. Use our Token Calculator to see the exact units you should receive before you buy — and screenshot it as evidence.
Your DisCo must respond within 10 working days under NERC's Customer Protection Regulations. If they don't, escalate to the NERC Forum Office (consumer complaints) or the Consumer Protection Council (CPC). Keep a copy of every communication. Email is the primary channel in WATT?, while WhatsApp is available only for DisCos with verified support lines.
NERC reviews tariffs under the MYTO framework, typically quarterly. Current rates in WATT? are effective from 13th May 2026. The data freshness banner in the Bill Auditor always shows the current effective date. We update the app whenever NERC publishes a new order.
No. WATT? is an independent consumer transparency tool. We are not affiliated with NERC, any DisCo, or any government body. We simply publish NERC's own mandated tariff data in an accessible format and help you compare it to what you're being charged.
Data Source: Tariff rates from NERC MYTO effective 13th May 2026. Fixed charges based on Ikeja Electric's published schedule — approximate for other DisCos. WATT? is an independent consumer tool, not affiliated with any DisCo or NERC. Always verify with your DisCo before formal dispute.