Bill check
Preview Version 0.1.0Price your bills from the kWh printed on them, line by line, and see how they compare with what you paid.
Computed bill
$115.00
This period comes to $115.00 on this tariff.
OpenEI Utility Rate Database (URDB) · OpenEISelf-checked · Three worked examples from the spec's scenarios, and 21 URDB rates classified and converted by hand, pass to the cent. What this means
Self-checked only: no independent check has been run yet · Example values · Review pending Report a problem
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How we got this
Method
Check the periods first (overlaps, duplicates, periods over 45 days, a month that reads like an extra digit, negative kWh). Then price each period on the tariff: the fixed charge, each tier's kWh at its rate, and the minimum bill, in exact micro-dollars rounded to the cent line by line. A period that crosses a season splits its kWh and tier allowances by days. Time-of-use bills are priced from the kWh in each period as the bill prints them.
Steps
- March 1 to March 30, 2026 (30 days, 800 kWh): fixed $10.00; all year tier 1, 500 kWh × 12¢ = $60.00; all year tier 2, 300 kWh × 15¢ = $45.00. Total $115.00.
- Effective price: $115.00 ÷ 800 kWh = 14.38¢ per kWh, from the computed bills.
Assumptions
- The tariff is the one in force for the whole period; a rate change within a period is treated like a season change only when it is entered as one.
- A tier allowance stated per day is multiplied by the days in the period.
- The effective price uses the amounts paid when every period has one, otherwise the computed bills.
Sources
- OpenEI Utility Rate Database (URDB), snapshot 2026-10, Energy rate structure, weekday and weekend schedules, fixed and minimum charges
- OpenEI, Utility Rates API documentation, version 7, Field definitions: energyratestructure (rate, adj, max, unit), fixedchargefirstmeter, mincharge
Known limits
- Taxes, local fees, and riders that the tariff data leaves out are not included, so a real bill is usually higher.
- Time-of-use energy is priced only from the kWh in each period as the bill prints them; a tiered time-of-use rate cannot be priced from totals.
- Demand charges need meter data and are not priced here.
- Export credits for net-metered months are not modeled; such a month prices only the charges that do not depend on kWh.