Municipal arbitrios in Peru: what they are, how they're calculated, and how to challenge them

Not a tax — a fee for a concrete service

Arbitrios aren’t the property tax, even though they often arrive on the same payment coupon. The TUO de la Ley de Tributación Municipal defines them as fees for public services: what you pay for the provision or upkeep of a public service individualized to you as a taxpayer. The most common are street cleaning, parks and gardens, and serenazgo (municipal security patrols) — each is calculated and charged separately, and each municipality decides which ones it charges and how it groups them.

The calculation isn’t free-form: the law sets the criteria

Here’s what most people don’t know: your municipality can’t set the arbitrios amount however it wants. The law requires the calculation to happen within the last quarter of the fiscal year before it applies, based on the effective cost of the service to be provided, and requires that determination to follow rationality criteria based on that cost and the individual benefit — real or potential — each taxpayer receives.

To distribute that cost among all of a municipality’s taxpayers, the law requires using, among other valid criteria, something very concrete: your property’s use, size, and location. That means two neighbors in the same district can pay different arbitrios amounts if their properties differ in use, size, or location — and the municipality has to be able to justify that difference through its own ordinance’s formula.

The ordinance has to be published before December 31

The municipality can’t simply send you a bill with a new amount without first having explained how it got there. The ordinance approving the arbitrios amount — explaining the effective costs the service demands based on the number of taxpayers in the benefited area, and the criteria justifying any increase — must be published no later than December 31 of the fiscal year before it applies.

If your municipality misses that deadline: it can’t charge whatever it wants

This is something very few taxpayers know, and it can work in your favor: if your municipality didn’t publish the ordinance on time, the law doesn’t let it charge whatever amount it decides. It can only set the arbitrios amount based on what it charged the prior year, adjusted by the accumulated variation in the Consumer Price Index for your department’s capital (or the Provincia Constitucional del Callao, if that applies to you). In practice, that’s a cap: if your municipality was late publishing the ordinance, the increase it can charge you that year is limited to accumulated inflation, not whatever it wants.

Mid-year increases have a limit too

Beyond the rule above, the law sets another limit: adjustments that increase arbitrios during the fiscal year itself, due to cost changes, can never exceed the percentage change in the Consumer Price Index set by INEI — using the index for Lima Metropolitana and the Provincia Constitucional del Callao for that area, and the index for the relevant department’s capital for the rest of the country.

How to dispute your individual bill

If, after checking all this, you think your arbitrios bill is miscalculated, your tool is the tax reclamación (dispute) under the Código Tributario — the same mechanism you’d use to dispute the property tax or another municipal tax debt.

• Deadline: 20 business days from notification of the resolution or act that sets the amount.
• Advance payment: not required if you’re disputing a Resolución de Determinación or de Multa. If it’s an Orden de Pago, you must pay first — unless circumstances show the charge could be improper, in which case you can dispute without paying first.
• Response deadline: the municipality has a maximum of 9 months to resolve your dispute.
• If it’s rejected: you can appeal to the Tribunal Fiscal within 15 business days of being notified of that decision. The Tribunal Fiscal has up to 12 months to resolve the appeal.

What if you want to challenge the ordinance itself?

This is where most informal sources get it wrong, so it’s worth being precise. Since the arbitrios ordinance is a regulation your municipality approved, it’s tempting to think you could challenge it with an acción popular — the process that does apply to regulations, administrative rules, and general resolutions, and that anyone can file before the Judiciary.

The problem is that municipal ordinances aren’t on that list. The Nuevo Código Procesal Constitucional expressly includes them among the norms challenged through an acción de inconstitucionalidad — a process filed before the Constitutional Court, not the Judiciary, with far more restricted standing. When filed by citizens, the Constitution requires the backing of five thousand signatures, verified by the Jurado Nacional de Elecciones — a threshold that, in practice, rules out someone acting alone.

That doesn’t mean the ordinance is untouchable: it just means that if you think the amount is miscalculated, your realistic route as an individual taxpayer is disputing your own bill — not litigating against the ordinance itself, which is reserved for a collective action with far broader citizen backing.

Arbitrios and property tax: same bill, different procedures

Although the property tax and arbitrios usually arrive on the same quarterly payment coupon, and both are municipal tax debts, they aren’t the same thing: the property tax taxes ownership of the property based on its value; arbitrios are payment for concrete services, calculated from the cost of those services. If you don’t pay either one, both can end up in the same municipal coercive collection procedure, with that process’s own rules and deadlines.

Check your case

Pick the tax and the document you received in Property tax and arbitrios: what can I challenge?: it tells you whether it can be challenged, before whom, within what deadline and whether you must pay first.