Bill Validation

Etainabl's AI-powered validation engine reads every energy invoice the moment it arrives and checks it against your contracted rates, meter data and tariff structure. Fully automated, so you recover money you're owed without lifting a finger.

Validation queue: live
Southern Electric: INV-2041Validated
Thames Water: INV-2042Validated
National Gas: INV-2043Overcharge £412
EDF Energy: INV-2044Estimated read

Suppliers get your bills wrong more than you think

Catch every billing error before it's paid. Incorrect charges are money you can claim back from your supplier.

10–20%

of total energy spend lost to billing errors that go undetected without automated validation.

40hrs+

per month spent on manual data collection, chasing invoices, VAT reconciliation and building spreadsheet reports.

Case study · Echo House

£10,968.21

credited back to the customer

Incorrect unit rates

Automated validation caught billing errors that manual checks had missed.

Immediate ROI

The platform paid for itself from a single billing correction.

Ongoing protection

Every future invoice is validated automatically, so errors can't slip through.

Every invoice that arrives, fetched from a supplier portal, forwarded by email, or uploaded by hand, is read automatically and run through Etainabl's validation engine before anyone has to look at it.

AI-powered capture

There are no per-supplier templates to maintain. Etainabl uses LLM-powered extraction to read any invoice format, including single- or multi-meter, credit notes and awkward scanned PDFs, and pull out every rate, read and charge. Invoices are even retrieved for you automatically from 20+ UK energy and water supplier portals.

40+ validation rules, per meter

Each invoice is checked against 40+ configurable rules, applied to every meter on the bill:

  • Contract rates: every unit rate, standing charge and capacity charge matched to your contract, within tolerance
  • VAT & CCL: correct VAT rate and reduced-rate de minimis, and CCL checked against HMRC published rates and your chargeable percentage
  • Consumption: billed usage cross-checked against half-hourly settlement data, meter reads and previous periods
  • Reads: read continuity across consecutive bills, with estimated reads flagged
  • Gas conversion: kWh recalculated from reads, calorific value and correction factor
  • Duplicates: caught by invoice number and by overlapping billing period
  • Account match: every MPAN, MPRN or SPID matched to the right meter
  • Passthrough charges: DUoS, TNUoS, BSUoS and other regulated charges surfaced for visibility

Every rule is configurable per company: switch checks on or off, set them to warn or fail, and tune the tolerances to suit your portfolio.

A clear validation queue

Results land in a validation queue marked passed, warning or failed, each with the evidence behind the verdict and a full history of any edits. Invoices you trust can be auto-validated straight through, so your team only spends time on the bills that genuinely need a human eye.

Bill validation, answered

Quick answers on how invoices are read, what gets checked and where the money comes back.

What is automated bill validation?

Every invoice that arrives, whether fetched from a supplier portal, forwarded by email or uploaded by hand, is read automatically and checked against your contracted rates, meter data and tariff structure before anyone has to look at it. Errors surface immediately, with the evidence attached.

How common are errors on energy bills?

More common than most teams expect: up to 20% of invoices contain errors, and 10–20% of total energy spend can be lost to billing errors that go undetected without automated validation. One customer, Echo House, had £10,968.21 credited back after validation caught incorrect unit rates that manual checks had missed.

Do you need a template for each supplier's invoice format?

No. Etainabl uses LLM-powered extraction to read any invoice format, including single and multi-meter bills, credit notes and scanned PDFs, pulling out every rate, read and charge. Invoices are also fetched automatically from 20+ UK energy and water supplier portals.

What does Etainabl check on each bill?

40+ configurable rules per meter: contract rates within tolerance, VAT and CCL against HMRC published rates, consumption against half-hourly settlement data, read continuity across consecutive bills, gas conversion from calorific value, duplicates by invoice number and overlapping period, and account matching on every MPAN, MPRN or SPID.

What happens when a bill fails validation?

It lands in the validation queue marked failed, showing exactly which checks it failed and the evidence behind each verdict. Your team only spends time on the exceptions; invoices you trust can auto-validate straight through.

Can the validation rules be customised?

Yes, per company: switch individual checks on or off, set each one to warn or fail, and tune the tolerances to suit your portfolio and contracts.

How do bills get into Etainabl?

Three routes: fetched automatically from 20+ supplier portals, forwarded by email, or uploaded by hand. Capture typically takes a couple of minutes per bill, and every capture is logged with a full history.

See Bill Validation on your own data

Book a 30-minute demo and we'll walk through exactly how this works for a portfolio like yours.

Book a demo