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Yvelines · Île-de-France · 12,573 residents

How much does Triel-sur-Seine spend?

Mayor: Cedric Aoun since March 2026 · 33 town councillors

17.7M€
spent in , municipal accounts
−17.6 % vs 2023 · +16.2 % since 2019
1,411 € per inhabitant · 21.2 M€ collected · balance +3.5 M€
−17.6 % vs 2023 · +16.2 % since 2019

What the money pays for in Triel-sur-Seine

The 2024 operating expenditure — investment aside — sorted this time by public policy rather than by type of spending.

Triel-sur-Seine spends 7 % less per inhabitant than towns of 10,000 to 20,000 inhabitants.

Allocated to a public policyShare of budget against towns of the same size13.4 M€

“elsewhere”: what towns the same size usually devoteTriel-sur-Seine devotes a larger share of its budgeta smaller share

Shares are computed on the allocated amount, excluding transfers. “Elsewhere”: the median share of towns the same size — half devote more, half less. Source: DGFiP accounting balances.

Spending and revenue

What the town pays for: staff, purchases, debt. 2019–2024 trend on each line.

Revenue21.2 M€

Property tax in Triel-sur-Seine

32.55%

municipal rate on buildings, set in 2025 · unchanged since 2023

Median for towns of its size band: 41.8%.

In 2024, Triel-sur-Seine collected 11.1 M€ in property and residence taxes, or 52% of its revenue.

What the town builds

4.2M€

invested in 2024 · €347 per inhabitant

Of which 3.2 M€ of equipment. That is −55.4 % compared with 2023.

Funding5.5 M€
Dotations et fonds propres4M€
Subventions d'investissement1.5M€
Emprunts et dettes4k€
What is built or repaid4.2 M€
Dépenses d'équipement3.2M€
Emprunts et dettes958k€

Investment section of the town’s accounts. The rest is funded by the savings made on day-to-day operations.

Debt

911

per inhabitant at end of 2024 · 11.5 M€ in total

Towns of its size: €778 per inhabitant · +78.4 % per inhabitant since 2018

Outstanding debt and gross savings: OFGL, main budget. The number of years is the debt-repayment capacity, debt divided by gross savings.

What the town buys

1.1M€

in public contracts awarded in 2019 · 8 contracts

Top supplier: HP BTP, 600 k€, travaux d’aménagement des voiries, grosses réparations et petit entretien

Marchés de plus de 40 000 € HT déclarés à la notification (DECP) : montants des contrats, pas les paiements. Les plus petits marchés ne sont pas publiés ; les montants manifestement erronés sont écartés. Years published by the town: 2019.

Compare with another town

Triel-sur-Seine versus Aubergenville
Triel-sur-SeineAubergenville
Local taxes
835 · 1,198per inhabitant
Debt
911 · 317per inhabitant
Gross savings
173 · 201per inhabitant
Property tax on buildings, municipal rate
32.55 % · 31.72 % in 2025

The full comparison

Per inhabitant, 2024 accounts, OFGL. Towns of the same département, by size. A town above or below is not better or worse run. Property-tax rate: municipal share only, excluding the inter-municipal body and additional levies, source REI DGFiP.

Source: DGFiP balance-sheet accounts (nature axis) · OFGL (consolidated commune base) · Public procurement — DECP (data.gouv.fr) · National register of elected officials · 2024·Data·Method