When a municipality takes over the management of its water or sanitation service, the public accountant creates a separate treasury account for the annex budget. This account is 515. For financial services that handle flows with the public treasury, it quickly becomes a daily management tool, far beyond a simple line in the accounting plan.
Account 515 and transition to M57: what changes concretely in local authorities
Since January 1, 2024, the M57 nomenclature has been generalized to all local authorities. It replaces M14, M52, and M71. For account 515, the direct consequence is a harmonization of the treatment of treasury accounts among municipalities, departments, and regions.
Before this transition, practices varied from one accounting position to another. Some public accountants systematically created a 515 account for each annex budget, while others pooled funds into the main budget account. The transition to M57 is decisive: each annex budget with sole financial autonomy can be assigned a dedicated 515 account.
You can understand account 515 with Smart ‘n Skilled to grasp the general mechanics, but the on-the-ground difficulty remains the management of compartmentalized treasury. An excess main budget does not automatically compensate for an annex budget under liquidity pressure. This dissociation sometimes forces local authorities to resort to treasury lines even though the funds exist, simply in another account.
Balance of account 515: a management indicator, not just a bank balance
Account 515 functions as a mirror of the account held with the public treasury. It is debited when the local authority disburses (paid mandates, loan repayments) and credited with each collection (tax revenues, allocations, received grants).
The peculiarity: local authorities are required to deposit all their available funds with the treasury, in accordance with Article 26 of the LOLF. These deposits are not remunerated. Keeping a high balance on 515 means immobilizing money without yield.
This is why monitoring the balance of account 515 is recommended as an operational management tool. In practice, a monthly treasury dashboard centered on this account is established, with three objectives:
- Anticipate cash flow dips related to the timing difference between revenue collections (often quarterly) and expenditure disbursements (continuous)
- Identify delays in the expenditure circuit that generate late payment interest, a cost often underestimated
- Calibrate treasury lines as accurately as possible to avoid incurring unnecessary financial charges on account 519
A 515 balance that fluctuates significantly from month to month signals a problem with budget rhythm. A stable and low balance, coupled with the absence of late payment interest, indicates controlled treasury management.
Relationship between account 515 and treasury lines in M57
In M57 nomenclature, account 519 records the treasury lines mobilized to cover occasional liquidity needs. Accounts 515 and 519 work in tandem: when the balance of 515 falls below a critical threshold, the local authority draws on its treasury line, which feeds 515 through the credit of 519.
The classic pitfall on the ground: opening an oversized treasury line “as a precaution” when an audit of the expenditure circuit would suffice to smooth out disbursements. Feedback varies on this point depending on the sizes of local authorities, but it is observed that coupling the monitoring of 515 with an audit of payment deadlines significantly reduces the reliance on treasury lines.
Typical entries to know
When the local authority receives a grant from the state, account 515 is debited by the credit of the relevant revenue account (class 7). Conversely, the payment of a supplier invoice results in a credit to 515 and a debit to the expense account (class 6).
For drawing on a treasury line, the entry involves a debit to 515 and a credit to 519. The repayment reverses the entry. These movements must be regularly reconciled with the treasury statement to detect discrepancies.
Common errors regarding account 515 in public accounting
The first error is the offsetting between 515 accounts. When a local authority holds multiple accounts with the treasury (main budget and annex budgets), no offsetting can be made between a credit balance account and a debit balance account. Each 515 account operates autonomously in the entries.
The second error concerns bank reconciliation. The treasury statement does not always arrive at the same pace as the entries made by the authorizing officer. Without regular reconciliation, discrepancies are noted at the end of the fiscal year, complicating the closure.
The third point: confusion between account 515 and account 512. Account 512 pertains to commercial banks. A local authority that mistakenly places a transaction with the treasury on account 512 distorts its balance sheet. In M57, account 515 is reserved for transactions with the public treasury and public establishments, while 512 pertains to relationships with private banking institutions.
Account 515 is not a technical account to be forgotten after setup. For local authorities transitioned to M57, it serves as the entry point for treasury management. A rigorous monthly monitoring of the balance, articulated with account 519 and a control of payment deadlines, transforms this simple account number into a lever for financial management. The key remains regular reconciliation with the treasury, the only way to ensure the reliability of entries at the end of the fiscal year.
