It's the most common response we hear from business owners and finance managers when we introduce OptiRate: "We don't have billing errors. Our bills are fine."
We've heard it from CFOs running R10 million annual electricity budgets. From operations managers at multi-site retail chains. From property managers overseeing portfolios of commercial buildings. And in the majority of cases, they've been wrong.
Not because they're negligent. Because municipal billing errors are invisible unless you know exactly where to look.
The Data Doesn't Support "We're Fine"
Across 6,017+ utility accounts audited by OptiRate in South Africa, 1,548 billing errors have been identified. That's approximately one in four accounts carrying a material billing error. The average saving identified is 18.6% of the total bill.
These aren't theoretical savings from switching tariffs or changing consumption patterns. These are errors — charges for electricity, water, or property rates that were calculated incorrectly by the municipality and paid in full by the business.
The businesses that said "we're fine" were, statistically, just as likely to have errors as the ones that suspected a problem. The difference was simply awareness.
Why Smart Businesses Still Get Overcharged
Billing errors aren't caused by your business doing something wrong. They're caused by the systems and processes municipalities use to generate millions of invoices every month. Here's why even well-managed businesses carry undetected errors:
Your accountant isn't a tariff specialist. Accountants verify that expenses are properly recorded and within budget. They don't recalculate electricity bills against the municipality's published tariff schedule, check CT ratios, or verify that demand readings are actual versus estimated. It's a different skill set entirely.
Your bills look "about right." Electricity costs fluctuate with seasons, production volumes, and external factors like load shedding. A 15–20% overcharge sits comfortably within the range of expected variation. It doesn't trigger a red flag because there's no baseline to compare against.
Errors compound silently. A wrong tariff code or incorrect CT ratio doesn't produce a single large overcharge. It produces a consistent, moderate overcharge every month. After 12 months, it's material. After 36 months (the typical dispute recovery period), it's significant. But no single invoice looks alarming.
What OptiRate Actually Checks
When we audit a business's utility accounts, we verify every component across the full utility portfolio:
Electricity: Energy charges (kWh rates against the published tariff), demand charges (kVA readings, CT ratios, NMD settings), time-of-use period allocation, network access charges, service charges, and levies. We confirm whether readings are actual or estimated and whether the correct tariff category is applied.
Water and sewerage: Consumption readings, stepped tariff block application, meter size charges, sewerage volume calculations (which are typically derived from water consumption), and infrastructure levies. Water billing errors follow the same patterns as electricity — estimated readings, wrong tariff blocks, incorrect meter sizes.
Property rates: Municipal valuation against comparable properties, property category and zoning classification, rates tariff application. A property classified in the wrong category pays the wrong rates for an entire valuation cycle — typically five years.
Metering: Physical meter accuracy, CT ratio configuration, smart meter data integrity, and consumption pattern analysis to detect meter faults or configuration errors.
Solar integration: For businesses with solar installations, we verify that feed-in tariffs are correctly applied, that demand charges reflect net consumption, and that the solar system's financial impact is being realised as modelled.
The Commercial Model: Zero Risk
OptiRate's audit is free. There's no upfront fee, no retainer, and no obligation. If we find billing errors and recover savings, we charge a percentage of the confirmed savings. If we find nothing, you pay nothing.
This means the worst-case outcome of an OptiRate audit is confirmation that your bills are correct — which, given the data, is worth knowing. The best-case outcome is recovering thousands or hundreds of thousands of rands in overpayments, with ongoing monitoring to prevent recurrence.
The Real Question
The question isn't whether your business has billing errors. Across 6,017+ accounts, the probability says it does. The question is whether you'd rather find out now — and recover the money — or continue paying and hoping for the best.
One in four accounts has a material error. Average saving: 18.6%. The audit is free. The only cost is the five minutes it takes to get started.
Book your free utility audit now — across electricity, water, property rates, and metering. If your bills are clean, you'll know. If they're not, you'll get your money back.
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