Understanding Estimated Billing and How to Dispute an Unfair Electricity Bill

If you've ever opened an electricity bill and wondered how a month with barely any change in your usage suddenly cost significantly more than the last, estimated billing is very likely the reason. It's one of the most persistent sources of frustration for Nigerian electricity customers, and understanding exactly how it works, and what your actual rights are, makes the difference between quietly paying an inflated bill and successfully getting it corrected.

What Estimated Billing Actually Is

Estimated billing happens when a Distribution Company, or DisCo, bills you for electricity based on a calculated guess rather than an actual meter reading. This isn't inherently illegal or automatically wrong, if you don't have a meter installed, the DisCo has to bill you somehow, and estimation is the fallback method. The problem is how badly this system has been abused in practice. Some customers have reported bills as much as 500% higher than what their actual usage would suggest, a gap that's led estimated billing to be widely nicknamed "crazy billing" among frustrated Nigerian electricity customers.

Why This Problem Has Persisted for So Long

The root cause is a massive metering gap. As of mid-2020, out of over ten million registered electricity customers in Nigeria, less than half had been properly metered, meaning the majority of customers were, and in many cases still are, billed through estimation rather than actual consumption data. The Nigerian Electricity Regulatory Commission has been trying to close this gap for years, introducing the Meter Asset Provider program back in 2018 with an ambitious goal of metering every customer within three years, a target that wasn't met given how large the underlying gap actually was.

More recently, NERC intensified its push to eliminate estimated billing entirely as part of a 2026 roadmap, which includes a Meter Acquisition Fund specifically dedicated to providing prepaid meters to customers at no cost, with a significant disbursement approved to DisCos for this purpose. The goal is closing what's been described as a roughly seven-million-meter gap nationwide, though the timeline for fully closing that gap continues to extend as the scale of the challenge becomes clearer.

The Regulatory Cap on Estimated Bills

While the metering gap gets closed, NERC has put a direct protection in place for unmetered customers: a monthly energy cap. Under this rule, an unmetered customer cannot be billed more than the average consumption of metered customers on the same feeder line, essentially using nearby metered neighbors' actual usage as a ceiling for what an unmetered customer can be charged. If a DisCo bills beyond this cap, that revenue is legally required to be deducted from the DisCo's accounts and credited back to the affected customers.

This cap was first introduced through a NERC order in February 2020, later amended, with capping fully effective from November of that year for customers in specific residential and commercial tariff categories. It remains one of the strongest tools an unmetered customer has if a bill looks significantly out of line with reasonable usage.

Your Right to Contest a Bill

NERC's consumer rights framework is explicit on this point: it is every customer's right to contest any electricity bill they believe is inaccurate. This isn't a courtesy extended by the DisCo, it's a formally recognized right, and understanding the specific mechanics of how to exercise it is what actually makes disputing a bill effective rather than just frustrating.

The Critical Right Most People Don't Know About

Perhaps the single most important thing to know if you're disputing an estimated bill: you have the right to withhold payment on the disputed amount while the dispute is being resolved, and instead pay only your last undisputed bill amount. This is a specific, formally recognized protection, you are not required to pay the inflated, disputed amount just to avoid disconnection while your complaint works through the process. Many customers don't realize this and end up paying bills they believe are wrong simply out of fear of being cut off, when the correct approach is paying your last known fair amount and formally disputing the rest.

Step-by-Step: How to Dispute an Unfair Bill

Start by lodging a written complaint directly with your DisCo's Customer Complaints Unit, this is the required first step before escalating anywhere else. Be specific in your complaint: state the billing period in question, the amount charged, why you believe it's inaccurate, and what you believe a fair amount would be based on your typical usage or the capping rule if you're unmetered.

Keep a copy of everything you submit, along with any reference number or acknowledgment the DisCo gives you. This becomes important if the dispute isn't resolved satisfactorily at this stage and needs to be escalated further.

While the dispute is being processed, continue paying your last undisputed bill amount rather than the disputed, higher figure, this keeps your account in reasonably good standing and protects you from disconnection while the complaint works through the system, without forcing you to accept a bill you believe is wrong.

If the DisCo's Customer Complaints Unit doesn't resolve the issue satisfactorily, or doesn't respond within a reasonable timeframe, escalate the complaint to NERC's own forum or complaints channel. NERC operates a formal dispute resolution process specifically for this purpose, and complaints that aren't adequately handled at the DisCo level are meant to be escalated here rather than simply abandoned.

Keep Detailed Records Throughout

Whether you're disputing a bill or actively pursuing a meter installation to avoid future estimated billing altogether, documentation matters enormously. Keep screenshots of your bills, receipts for any payments made, and copies of all correspondence with your DisCo, including dates and any names or reference numbers given to you. If a dispute stalls or drags on longer than it should, this evidence becomes the foundation for pushing it forward or escalating it further.

Applying for a Prepaid Meter

The most durable long-term fix to estimated billing frustration is getting a proper meter installed, since a metered account bills you for exactly what you use, removing the estimation problem entirely. NERC's Metering Code defines what qualifies as a legitimate prepaid meter and forms the technical framework DisCos are supposed to follow. If you're pursuing a meter application, the safest route is going through your DisCo's official channels directly, and again, keeping records of every step of the application in case it stalls.

It's also worth knowing that a customer whose prepaid meter later malfunctions shouldn't automatically be pushed back into ordinary estimated billing as though they'd never had a meter at all, this distinction matters if you ever find yourself back on an estimated bill despite having had a working meter previously.

Why Estimated Billing Disputes Are Especially Common in Shared or Rented Properties

Estimated billing has been identified as one of the leading causes of disputes in multi-tenanted properties specifically, since shared bills often mean one estimated, inflated charge gets divided across multiple households, none of whom individually consumed anywhere close to that amount, and none of whom have full visibility into whether the estimate was fair in the first place. If you're in a shared or rented property dealing with this, the same dispute rights apply, but it's worth raising the estimated billing issue with your landlord or property manager directly too, since individual metering, where feasible, resolves this specific problem far more cleanly than continuing to split an estimated bill among tenants.

What to Expect Going Forward

The regulatory direction is clearly toward eliminating estimated billing entirely, with continued funding directed at closing the metering gap and stricter enforcement mechanisms for DisCos that overcharge unmetered customers beyond the capped amount. This doesn't mean the problem disappears immediately, but it does mean the tools available to challenge an unfair bill, the capping rule, the formal dispute process, and the right to withhold disputed payments, are backed by an active regulatory push rather than existing only on paper with no real enforcement behind them.

The Bottom Line

Estimated billing exists because a meaningful share of Nigerian electricity customers still don't have proper meters, but that doesn't mean an inflated estimated bill has to simply be accepted and paid. You have a clear right to contest any bill you believe is inaccurate, a regulatory cap that limits what unmetered customers can legally be charged, and the right to withhold the disputed amount while paying only your last confirmed fair bill during the process. Knowing these specific rights, and following the formal complaint process rather than either paying quietly or simply venting frustration without escalating it properly, is what actually gets an unfair bill corrected.