FUNRURAL Refund.
Who still has a right — and why the sub-rogation thesis remains pending at the STF.

What can still be refunded — and what can no longer be

FUNRURAL is the social security contribution levied on the gross revenue from the sale of rural production — owed by the individual rural producer (art. 25 of Law 8.212/91) and by the rural legal-entity employer / agro-industry (art. 25 of Law 8.870/94). For years, the refund thesis was treated as a wide-open door available to any producer who had paid. That reading is now behind us, and insisting on it is the costliest mistake on the topic.

What has fallen: the broad refund for the individual producer

The contribution of the individual rural producer was held constitutional by the STF as of Law 10.256/2001 (Theme 669). This means that, for the period in which that law is in force, there is no undue payment — the producer who paid FUNRURAL since then paid a tax that was owed. The thesis of “recovering all FUNRURAL paid” simply no longer exists as a broad right of the individual producer.

What remains: two specific fronts

Even so, there is something to recover — on narrowly defined fronts. The first is the undue payment for the period before Law 10.256/2001, when the levy rested on Laws 8.540/92 and 8.870/94 and was held unconstitutional (both individual and legal entity). The second, and more relevant today, is the acquirer sub-rogation: the meatpacker, the cooperative or the grain dealer that was required to withhold and pay the producer’s FUNRURAL by sub-rogation may have a right to a refund — a thesis argued in ADI 4.395 that the STF has not yet proclaimed. The TaxUp team begins every diagnosis by distinguishing these fronts, because each client’s position depends entirely on which one applies.

The STF timeline — the cut between undue and owed

The unconstitutional period (undue payment)

The first wave of theses was born from RE 363.852/MG (Frigorífico Mataboi, reporting Justice Marco Aurélio, decided in 2010): the Full Court, unanimously, held unconstitutional the contribution of the individual rural employer on gross revenue, in the wording given by Law 8.540/92, for lack of a constitutional basis before EC 20/1998. Because there was no modulation, the ruling generated an undue payment — a right to refund what was paid in that period. In 2011, the understanding was confirmed under general repercussion in RE 596.177/RS (Theme 202), generalizing the undue payment of the individual producer. In 2017, Federal Senate Resolution No. 15 suspended the enforcement of the provision held unconstitutional — a formal reinforcement of the refund right for that period.

The constitutional period (owed)

The watershed is Law 10.256/2001, enacted already under EC 20/1998 (which added “revenue” among the bases of art. 195, I, of the Constitution). In RE 718.874/RS (Theme 669), decided on 30/03/2017, the STF recognized the constitutionality of the individual rural producer contribution instituted by that law. The same logic was applied to the legal entity / agro-industry in RE 700.922/RS (Theme 651), concluded in December 2022: unconstitutional in the wording prior to EC 20/1998, constitutional as of Law 10.256/2001. In other words: the time cut is sharp — before Law 10.256/2001, undue; as of it, owed.

Do not invert the themes. Theme 202 (RE 596.177) establishes the unconstitutionality of the old period; Theme 669 (RE 718.874) establishes the constitutionality as of 2001. They point in opposite directions — confusing them is the origin of refund claims that fail.

The acquirer sub-rogation — the living (and still pending) thesis

It is in the sub-rogation that the most relevant refund front still open resides — and also the one that demands the most caution. Under art. 30, IV, of Law 8.212/91, the acquirer of rural production (meatpacker, cooperative, grain dealer, agro-industry) was required to withhold and pay, by sub-rogation, the FUNRURAL owed by the individual producer. Whoever fulfilled that obligation and paid the tax may, in theory, have a right to recover it.

What is on trial in ADI 4.395

The constitutionality of that sub-rogation is the subject of ADI 4.395 (reporting Justice Gilmar Mendes), on the argument that there would be no valid legal basis to transfer to the acquirer the obligation to pay a third party’s tax. The merits were concluded in a virtual session closed in December 2022, with a majority formed for the unconstitutionality of the sub-rogation — but the outcome is not yet final.

Dated content (June 2026) — pending thesis. ADI 4.395 has not been proclaimed: the result and its reach remain in dispute, there is no final and unappealable decision and, therefore, no definitively set thesis. In January 2025, the STF ordered the nationwide suspension of all cases discussing art. 30, IV, of Law 8.212/91 until the final decision of the ADI (a measure ratified by the Full Court in February 2025). The eventual modulation of effects — which may limit who and how much recovers — will only be known upon proclamation. Any strategy must be built on this scenario of uncertainty, and not on a result taken as settled.

Why act even with cases suspended

The suspension of the cases does not suspend the limitation period. Each month that passes lets the oldest period of the credit lapse. That is why, for the acquirer that paid by sub-rogation, the practical decision is not “wait for the STF”: it is to preserve the right within the five-year window — filing the appropriate measure to interrupt the limitation period — while the merits are awaited. Waiting for the proclamation with arms crossed usually means losing, to the limitation period, precisely the oldest and largest installments.

Who has standing to ask for it back

Defining who can seek the refund is as decisive as defining the period. There are three distinct positions, each with its own grounds.

Rural producer and agro-industry — old period

The individual rural producer who paid FUNRURAL directly in the period before Law 10.256/2001 has a right to the undue payment (RE 363.852, Theme 202). The rural legal-entity employer / agro-industry has a mirrored situation in the wording prior to EC 20/1998 (Theme 651, item I). In both cases, the front is the past before 2001 — not the current payments.

Sub-rogated acquirer — the rule of art. 166 of the National Tax Code

The acquirer that withheld and paid by sub-rogation has standing to recover the undue payment because the relationship between it and the producer is one of private law, and the statutory sub-rogation works as the authorization required by art. 166 of the National Tax Code for the refund of a tax that admits pass-through — an understanding recognized by the STJ (among others, REsp 173.907/RS and REsp 140.204/PR). There is, however, a central caveat: when the financial burden was actually borne by the producer (because the amount was deducted from the price paid to it), the refund belongs to whoever proves it bore the charge. Determining who bore the burden, contract by contract, is an essential part of the work — and avoids claiming what belongs to another link in the chain.

Recoverable period and the routes — administrative and judicial

The window: five years

The right to seek the refund extinguishes in five years (art. 168 of the National Tax Code). Because it is a contribution subject to self-assessment, the STF set, in RE 566.621/RS (Theme 4), that the window runs from the date of payment, for actions filed as of 09/06/2005 (Complementary Law 118/2005). In practice, one recovers, as a rule, what was paid over the last five years — hence the importance of filing early, especially on the sub-rogation front, where the STF definition may take time.

Administrative route

The administrative request for refund or offset is made in the Federal Revenue’s PER/DCOMP Web, governed by IN RFB 2.055/2021, and requires the amendment of the originating return (GFIP or, under the current regime, EFD-Reinf/DCTFWeb). There is an important limit: the cross offset of a social security credit against debts of other federal taxes (art. 26-A of Law 11.457/2007) only reaches credits and debts assessed in the eSocial/DCTFWeb environment — old social security credits, such as those of FUNRURAL, as a rule only offset debts of the same nature. This directly affects how the credit will be used.

Judicial route

The judicial route comes in when there is resistance from the tax authorities, when the thesis depends on recognition (the case of sub-rogation) or when a refund in cash is sought. The alternatives are the action for the recovery of undue payment — refund via court-ordered payment, adjusted by SELIC — and the writ of mandamus to declare the right to offset (Precedent 213/STJ). It is worth recalling that the offset of a credit recognized judicially may only be carried out after the final and unappealable decision (art. 170-A of the National Tax Code). When the thesis requires the litigation route, the work connects to the writ of mandamus and the other judicial measures conducted by the firm.

Illustrative case — a meatpacker that paid by sub-rogation

Illustrative case. Figures are examples and do not correspond to a specific client — they serve to show the TaxUp team’s method of work.

The context

An animal-protein agro-industry buys cattle from hundreds of individual rural producers and, by sub-rogation, had been withholding and paying the FUNRURAL they owed, deducting part of the amount from the price paid to the producer. With the ADI 4.395 controversy, the company began to ask whether it could recover what it paid — and how to act while the STF has not decided.

The team’s reading

The TaxUp team was direct about the uncertainty: the sub-rogation thesis is not yet closed — the merits moved toward recognizing the unconstitutionality, but the proclamation and any modulation remain pending, and the cases are suspended. There is no promise of a result. The decisive technical point, however, is another: part of the FUNRURAL was deducted from the producer in the price, and part may have been borne by the company itself — and only the latter, in light of art. 166 of the National Tax Code, admits a refund to the agro-industry.

The execution

The work consisted of (i) mapping, period by period over the last five years, the FUNRURAL withheld and paid by sub-rogation; (ii) separating, contract by contract, the portion whose burden the company actually bore; and (iii) filing the appropriate judicial measure to interrupt the limitation period and qualify the credit when — and if — the STF concludes ADI 4.395 in favor of the thesis. The result was not the promise of an amount, but the preservation of the right: while the Court has not decided, the company stopped losing, to the limitation period, its oldest periods.

How the firm acts — and the five-year clock

A diagnosis that separates the solid from the pending

The TaxUp team starts from a distinction that defines the whole strategy: what is a solid undue payment — the period before Law 10.256/2001, already decided by the STF — and what is a pending thesis — the acquirer sub-rogation, which depends on the proclamation of ADI 4.395. For each client, the diagnosis identifies which front applies, who has standing (producer, agro-industry or acquirer) and who bore the financial burden, before any recommendation. Selling certainty where the Supreme Court has not yet decided would fall short of the technical honesty the topic demands.

Preserving the limitation period is the urgent decision

Because the suspension of the cases does not interrupt the window, the most important practical action is to preserve the five-year limitation period — filing the appropriate measure so that the old periods are not lost while the STF has not concluded the trial. It is the opposite of waiting: those who await the proclamation without acting usually arrive there with less to recover. The work relies on the digital tax audit of the payments and connects to the company’s other recovery of tax credits theses.

The sector and what is paid today

The front is of close interest to agribusiness — producers, cooperatives, meatpackers and agro-industries. It is worth noting the present context: the FUNRURAL rates were increased by Complementary Law 224/2025, in force as of 01/04/2026, which makes the correct sizing of the base even more relevant for those who pay. For those seeking the past, the concept of the tax is detailed in the FUNRURAL glossary entry; for those looking at the present, correct assessment avoids overpaying under the new rates.