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Uruguay's political system and how laws are made: what investors need to know

Last verified: 2026-10-27 · Status: Stable

Uruguay is a unitary presidential republic. The President, the 30 member Senate and the 99 member Chamber of Representatives are all elected together for five years, and a President cannot serve two terms in a row. The current term runs from 1 March 2025 to 1 March 2030, and the next national election falls on 28 October 2029. Only the Executive can propose tax exemptions, minimum wages and pension benefits. Urgent bills become law automatically if Parliament does not reject them in time, and 25 percent of voters can force a referendum on most laws within a year, but not on tax laws. The Supreme Court can declare a law unconstitutional, but the ruling covers only the case before it. Expropriation needs a law and just compensation paid in advance.

Key facts

Presidential term	5 yearsConstitución art. 152, as of 2026-10-27 · in force
Start of current presidential term	2025-03-01 dateConstitución art. 158; Presidencia notice of 1 March 2025, as of 2025-03-01 · in force
End of current presidential term	2030-03-01 dateConstitución art. 152 and art. 158, as of 2025-03-01 · in force
Last national election (first round)	2024-10-27 dateCorte Electoral, results of the 2024 national election, as of 2024-10-27 · in force
Next national election (last Sunday of October 2029)	2029-10-28 dateConstitución art. 77 numeral 9, as of 2026-10-27 · pending
Senate seats (plus the Vice President, who presides)	30 seatsConstitución art. 94, as of 2026-10-27 · in force
Senate term	5 yearsConstitución art. 97, as of 2026-10-27 · in force
Chamber of Representatives seats	99 seatsConstitución art. 88, as of 2026-10-27 · in force
Chamber of Representatives term	5 yearsConstitución art. 89, as of 2026-10-27 · in force
Maximum parliamentary time for an urgent consideration bill (45 + 30 + 15 + 10 days)	100 daysConstitución art. 168 numeral 7, as of 2026-10-27 · in force
Executive deadline to return a bill with objections	10 daysConstitución art. 137, as of 2026-10-27 · in force
Majority needed to override a veto in the General Assembly	3/5 of members present in each chamber majorityConstitución art. 138, as of 2026-10-27 · in force
Who can propose tax exemptions and minimum wages	Executive only initiativeConstitución art. 133, as of 2026-10-27 · in force
Share of registered voters needed for a referendum against a law (not tax laws)	25 %Constitución art. 79, as of 2026-10-27 · in force
Plebiscite threshold for constitutional reform (art. 331 A and B)	Absolute majority of voters, at least 35% of registered voters majorityConstitución art. 331, as of 2026-10-27 · in force
Expropriation compensation	Just and prior compensation, including currency value losses ruleConstitución art. 32, as of 2026-10-27 · in force

The rule

1. The President and Vice President are elected together by direct vote and need an absolute majority of votes cast. If no ticket gets one, a runoff between the two leading tickets is held on the last Sunday of November. The first round, together with the election of both chambers, is held on the last Sunday of October every five years. The term is five years. A President can serve again only after five years out of office. The President and Vice President take office on 1 March after the election. The current constitutional term runs from 1 March 2025 to 1 March 2030, following the national election of 27 October 2024.
Example: On the constitutional calendar, the next first round falls on Sunday 28 October 2029, a possible runoff on Sunday 25 November 2029, and the handover on 1 March 2030. Plan any approvals that depend on the current administration around those dates.Constitución de la República (art. 77 and art. 151 as worded by the constitutional reform approved by plebiscite on 8 December 1996); Presidencia de la República, inauguration notice of 1 March 2025, Art. 77 numeral 9, art. 151, art. 152 and art. 158, 1996-12-08 official text · verified 2026-10-27

2. The Chamber of Representatives has 99 members elected by proportional representation based on each party's national vote, with at least two seats per department. Changing the number of seats needs two thirds of all members of each chamber. The Senate has 30 members elected nationwide as a single constituency, plus the Vice President, who presides with voice and vote. Representatives and Senators serve five years.Constitución de la República (art. 88 as worded by the 1996 reform), Art. 88, art. 89, art. 94 and art. 97, 1996-12-08 official text · verified 2026-10-27

3. Bills may start in either chamber, proposed by any member or by the Executive through its ministers. Only the Executive can propose a law that grants tax exemptions or sets minimum wages or purchase prices for public or private goods. Parliament cannot raise the exemptions or minimums the Executive proposes, or cut the maximum prices it proposes. The Executive also has exclusive initiative to create public posts, set or raise pay or pensions, and set or change retirement rules and benefits. Any other law that creates Treasury spending must name the resources that will cover it. Authorizing national public debt also needs the Executive's initiative and an absolute majority of all members of each chamber.Constitución de la República, Art. 133, art. 86 and art. 85 numeral 6, 1967-02-02 official text · verified 2026-10-27

4. The Executive may send Parliament bills declared of urgent consideration, but only one at a time. Budgets, and bills that need three fifths or two thirds of all members, cannot be sent as urgent. The first chamber has 45 days and the second 30. If the second chamber approves a different text, the first has 15 days to respond, after which the General Assembly has 10. A chamber that does not expressly reject the bill within its period is deemed to have approved it as sent. Each chamber can remove the urgency with three fifths of all its members, after which the normal procedure applies.
Example: The longest possible path is 45 + 30 + 15 + 10 = 100 days from the day after Parliament receives the bill. Ley Nº 19.889, the Ley de Urgente Consideración (promulgated 9 July 2020, published 14 July 2020), passed this way. It still holds the fiscal rule chapter, which Ley Nº 20.446 rewrote in 2025.Constitución de la República, Art. 168 numeral 7, literals a) to h), 1967-02-02 official text · verified 2026-10-27

5. Once Parliament passes a bill, the Executive has 10 days to return it with objections. If it does not, the bill has the force of law. A vetoed bill goes to the General Assembly, which can override the objections by three fifths of members present in each chamber. If the Executive has no objections it says so immediately, and the bill is promulgated without delay.Constitución de la República (art. 138 as worded by the 1996 reform), Art. 137, art. 138, art. 143 and art. 144, 1996-12-08 official text · verified 2026-10-27

6. Within one year of a law's promulgation, 25 percent of registered voters can file a referendum appeal against it. The same share can also put a legislative initiative before Parliament. Neither tool applies to laws that create taxes, or to matters where only the Executive can propose laws. Both are regulated by a law passed by an absolute majority of all members of each chamber.Constitución de la República (art. 79 as worded by the 1996 reform); Ley Nº 16.017 of 20 January 1989, Art. 79, 1996-12-08 official text · verified 2026-10-27

7. The Constitution can be amended by a popular initiative of 10 percent of registered voters, or by a project backed by two fifths of the General Assembly. Either way it goes to a plebiscite at the next election and passes only if an absolute majority of those voting say Yes and that majority is at least 35 percent of all registered voters. Senators, Representatives or the Executive can also propose a reform. If the General Assembly approves it by an absolute majority of all its members, a National Constituent Convention is elected, and its text must then be ratified by voters.Constitución de la República, Art. 331, 1967-02-02 official text · verified 2026-10-27

8. Either chamber can propose that the General Assembly censure ministers. Censure needs an absolute majority of all members of the Assembly and forces the minister, ministers or Council of Ministers to resign. If the vote falls short of two thirds, the President can object. If the Assembly then confirms the censure by less than three fifths, the President can keep the ministers and dissolve both chambers, calling new parliamentary elections.Constitución de la República, Art. 147 and art. 148, 1967-02-02 official text · verified 2026-10-27

9. A law can be declared unconstitutional for its form or its content. Anyone whose direct, personal and legitimate interest is harmed can ask for this by filing an action before the Supreme Court of Justice or by raising it as a defence in any court case. Judges can also refer the question on their own initiative. The Supreme Court's ruling covers only the specific case and has effect only in the proceedings where it is given. Departmental decrees with force of law can be challenged the same way.Constitución de la República, Art. 256, art. 257, art. 258, art. 259 and art. 260, 1967-02-02 official text · verified 2026-10-27

10. Property is an inviolable right but subject to laws passed in the general interest. Nobody can be deprived of property except for public necessity or utility declared by law, and always with just compensation paid in advance by the National Treasury. Once an expropriation is declared, the owner is also compensated for losses caused by how long the procedure takes, whether or not the expropriation goes ahead, including losses from changes in the value of money.Constitución de la República, Art. 32, 1967-02-02 official text · verified 2026-10-27

11. Article 85 assigns legislative powers to the General Assembly. Treaties of peace, alliance and commerce, and conventions or contracts of any kind the Executive signs with foreign powers, need approval by an absolute majority of all members of each chamber. Only the Assembly can establish customs and import and export duties. Granting a monopoly needs two thirds of all members of each chamber, or an absolute majority if it is in favour of the State or departmental governments.Constitución de la República, Art. 85 numerals 7, 9 and 17, 1967-02-02 official text · verified 2026-10-27

Event	Rule	Date
National election (first round)	Last Sunday of October every five years	27 October 2024
Departmental and municipal elections	Second Sunday of May of the following year	11 May 2025
Presidential term starts	1 March after the election	1 March 2025
Next national election (first round)	Last Sunday of October 2029	28 October 2029
Possible presidential runoff	Last Sunday of November	25 November 2029
Next presidential term starts	1 March after the election	1 March 2030
Next departmental and municipal elections	Second Sunday of May 2030	12 May 2030

Constitutional political calendar, 2024 to 2030 (Constitución art. 77, 151 and 158; dates computed from the constitutional rules)

Decision	Majority	Article
Authorize national public debt	Absolute majority of all members of each chamber, Executive initiative	Art. 85 numeral 6
Approve treaties of commerce and contracts with foreign powers	Absolute majority of all members of each chamber	Art. 85 numeral 7
Grant a private monopoly	Two thirds of all members of each chamber	Art. 85 numeral 17
Override a veto	Three fifths of members present in each chamber	Art. 138
Remove urgent consideration	Three fifths of all members of the chamber	Art. 168 numeral 7 c)
Electoral law changes	Two thirds of all members of each chamber	Art. 77 numeral 7
Censure ministers	Absolute majority of all members of the General Assembly	Art. 148

Voting thresholds an investor should know (Constitución)

Worked example

Timing a law change. Parliament receives an urgent bill on 2 March. The first chamber's 45 days start the next day. If that chamber does not expressly reject the bill, it is deemed approved as sent and passes to the second chamber, which has 30 days. If the second chamber also lets its time run out, the bill is deemed approved and goes to the Executive. If a chamber changes the text, the longest possible path is 100 days (Constitución art. 168 numeral 7).
Referendum risk. A non tax law promulgated on 1 June 2027 can be challenged by a referendum appeal backed by 25 percent of registered voters until 1 June 2028 (art. 79). A law that only creates taxes cannot be challenged this way, and neither can matters where only the Executive can propose laws. Price that window into any investment that depends on a new non tax statute.
Unconstitutionality is case by case. If a company wins an unconstitutionality ruling against a levy, only that company's case is covered (art. 259). Every other affected business must bring its own action or raise the defence in its own case.

Step by step

1. Map which powers you depend on. Tax exemptions, minimum wages and pension rules need an Executive bill (art. 133 and art. 86). Debt, treaties and customs duties need a law (art. 85).
2. Track bills on the Parliament site and promulgated laws on IMPO, the official gazette database. Under art. 144, a bill becomes law if the Executive does not return it within 10 days.
3. For any statute your project relies on, diary the 12 month referendum window after promulgation (art. 79), unless the law creates taxes.
4. Build the electoral calendar into your plan. The national election is on 28 October 2029 and the new term starts on 1 March 2030. Budget and hiring freezes apply in the 12 months before the election (see macro/public-finances-budget-and-debt).
5. If a law harms your business, ask local counsel early whether to bring an unconstitutionality action before the Supreme Court or raise it as a defence (art. 258), since rulings only bind the case.
6. In any concession or land deal, check expropriation exposure: a declaring law, compensation paid in advance, and damages for delay and currency changes (art. 32). See real-estate/buying-and-owning-property.
7. Follow upcoming changes in start/reform-tracker and key dates in /calendar/.

Common traps

Assuming the President can be reelected. A President must stay out of office for five years before serving again (art. 152), so policy continuity depends on the party, not the person.
Treating silence as rejection. Urgent bills and vetoed bills work the other way: if Parliament misses its urgent deadline, or the Executive misses the 10 day veto window, the bill becomes law (art. 168 numeral 7 and art. 144).
Expecting a court ruling to strike down a law for everyone. Unconstitutionality rulings bind only the case decided (art. 259).
Lobbying Parliament for a tax exemption. Members cannot propose one or raise one the Executive proposed (art. 133), so the ministry is the counterpart.
Ignoring direct democracy. Referendums on laws and plebiscites on constitutional reforms are part of the system (art. 79 and art. 331), so a statute can be challenged within a year of promulgation.
Forgetting the departmental level. Intendentes and Juntas Departamentales are elected separately in May (art. 77 numeral 9) and set urban property taxes and local fees (art. 297). See taxes/local-taxes.

Sources

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