Customer Deposit - Interest Accrual (PUC-Mandated Rate)
Accruing interest on customer deposits at the tariff-mandated rate, typically equal to the 6-month or 1-year Treasury bill rate, credited annually to the customer's deposit balance.
| Account Name | Type | Debit ($) | Credit ($) |
|---|---|---|---|
| Interest Expense - Customer Deposits | Expense (+) | 28,500.00 | - |
| Customer Deposit Liability (Interest Credited) | Liability (+) | - | 28,500.00 |
💡 Accountant's Note
State PUC tariffs require utilities to pay interest on customer deposits. The rate is typically set by commission order (often 6-month T-bill rate, prime rate, or a fixed rate specified in the tariff). Interest is credited to the deposit balance annually (or upon refund) and must be paid to the customer when the deposit is returned. Failure to pay interest is a tariff violation subject to penalties. The aggregate annual interest expense on customer deposits can be significant for utilities with large deposit portfolios.
Practitioner & Systems Framework
💻 ERP Architecture
Automate the interest accrual in the billing system based on each customer's deposit amount, deposit date, and the applicable tariff rate. Generate an annual report of interest credited to each customer's deposit account. Provide a combined refund of principal plus accrued interest upon service termination.
⚠️ Audit Flags
Auditors recalculate interest on a sample of customer deposits and verify the correct tariff rate was applied. Interest on deposits held for extended periods (particularly when the tariff rate has changed over time) must be calculated correctly for each rate period. PUC compliance reviews specifically test customer deposit interest compliance.
📄 Required Documentation
Customer deposit tariff specifying interest rate and calculation method, deposit register with dates and amounts, annual interest calculation report, interest payment or credit documentation upon deposit refund.
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Expert Analysis by Qusai Ahmad
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