Your Retirement Salary Average: The 80% Rule vs. the 100% Rule

This page is a translation of the original Portuguese text, provided for convenience. It deals with Brazilian law. If there is any discrepancy, the Portuguese version prevails. Read the original in Portuguese

Your salary average determines how much your retirement benefit from INSS (Brazil’s National Social Security Institute) is worth, and the way it is calculated changed with the social security reform. Understanding the difference between the 80% rule and the 100% rule helps you predict your benefit and avoid losses that last for decades.

How INSS Calculates the Salary Average for Your Retirement

Every retirement calculation starts with the average of your contributions. INSS gathers the contribution salaries recorded since July 1994, adjusts each amount for inflation, and uses that set of figures to determine what is known as the salário de benefício (the benefit base). The retirement percentage is applied to this average, not directly to the last salary you earned while working.

Many insured workers believe their retirement benefit will equal the salary of the month they stopped working. In practice, the benefit comes from a historical average. That is why low contributions early in a career, or payments based on the minimum wage, affect the final result, even if the worker ended his or her working life with a higher salary.

The rule that defines this average went through a decisive change. Until 2019, INSS threw out a portion of the lowest contributions when doing the calculation. After Constitutional Amendment 103, of November 13, 2019, that practice ended. The gap between the two models is exactly what separates the 80% rule from the 100% rule.

The 80% Rule: What Applied Before the Reform

Before the reform, the benefit base was calculated on the average of the highest 80% of contribution salaries since July 1994. The system ranked all payments from highest to lowest and discarded the lowest 20%. Only the upper portion went into the calculation, which tended to raise the average and, with it, the benefit.

This exclusion favored people who had low contributions during some period, such as the start of a career, stretches of unemployment, or payments made at the wage floor. By eliminating the worst 20%, the average went up. It was a way to protect workers from being penalized for periods of lower pay during their contribution history, a common situation in long and varied careers.

The 80% rule still matters because it continues to apply to anyone who met the requirements before November 13, 2019. These insured workers have a vested right (direito adquirido) and can demand that the benefit be calculated under the old formula, even if they apply today. Checking the exact date on which the right was reached is a central step in any retirement planning.

If you met the requirements before November 13, 2019, you keep the right to have your benefit calculated under the 80% rule, even if you apply for retirement years later.

For this reason, reconstructing your contribution history is as important as knowing the formula. A single forgotten employment relationship can move up the date on which you met the requirements and, in doing so, secure the more favorable calculation. The difference is rarely small when you project the amount received over the entire length of retirement.

The 100% Rule: What Changed with EC 103/2019

With Constitutional Amendment 103, the exclusion of the lowest 20% of salaries ended. Since then, the benefit base has been calculated on the average of 100% of the contributions made from July 1994 onward. Every payment counts, including the lowest ones, which tends to bring the average down compared with the earlier model.

In practice, the 100% rule usually reduces the retirement benefit of people with irregular contributions. Periods at the minimum wage, gaps, and small payments now weigh on the result. For many workers, the switch between the two formulas means a significant monthly loss, which lasts for the entire life of the benefit and is passed on to any survivor’s pension (pensão por morte).

There is, however, some room for adjustment. In specific situations, you may request that contributions that lower the average be excluded, as long as this does not compromise the minimum contribution time required for the benefit. This adjustment depends on a technical analysis of your history and is not always advantageous, which is why it calls for a careful simulation before you file any request with INSS.

From Benefit Base to Monthly Payment: The Second Calculation

Finding the average is only the first step. A coefficient is applied to the benefit base to determine the initial monthly benefit, that is, the amount you actually receive. Under the general rule of the reform, this coefficient starts at 60% of the average and increases by 2% for each year of contribution beyond 20 years for men and 15 years for women.

This means a high average does not always guarantee a full benefit. A worker with a high average but little contribution time may receive a low percentage of it. Someone who has paid in for many years, on the other hand, reaches higher coefficients and gets close to 100% of the average. Contribution time, therefore, counts twice in the final amount.

The result is also subject to legal limits. No retirement benefit can fall below the national minimum wage, set at R$ 1.621,00, or exceed the INSS cap of R$ 8.475,55. Even with a high average, the benefit is cut off at the cap, which makes planning even more important for those who contributed on amounts close to that maximum limit.

What You Should Check Before Applying for Retirement

Before filing your request, you need to review your statement from the Cadastro Nacional de Informações Sociais (National Social Information Registry), known as CNIS. This document lists all the contribution salaries used in the calculation. Frequent errors improperly drag the average down and often go unnoticed until the time you apply.

• Employment relationships that do not appear on the statement.
• Salaries recorded at a lower amount than what you actually earned.
• Periods without payments that should have been recorded.
• Missing contributions from self-employment or voluntary payments.

Comparing the transition rules is also essential. Depending on your contribution time and age, it may be more advantageous to wait a few months, use the points rule, or choose a specific transition formula. Small differences in dates change the coefficient and, with it, the amount you receive for decades, so a detailed simulation helps you avoid hasty decisions.

At this stage, legal guidance makes a real difference. The firm Cassius Marques ADVOCACIA guides insured workers in gathering documents, correcting the CNIS, and simulating scenarios before filing. Knowing alternatives such as scheduled retirement and how it works and urban retirement by age and its requirements helps you choose the most favorable calculation path.

Frequently Asked Questions

What is the difference between the 80% rule and the 100% rule?

The 80% rule calculates the average by discarding the lowest 20% of contribution salaries since July 1994, which usually raises the amount. The 100% rule, which applies after the 2019 reform, uses all contributions with no exclusions. For that reason, the second model tends to lower the average, especially for people who made low payments during part of their working life. Which formula applies depends on the date on which you met the requirements for the benefit.

Why might my retirement benefit be lower than my current salary?

Because the benefit does not equal your last salary. It reflects the historical average of your contributions, adjusted for inflation, since July 1994. Low salaries in the past, periods without payments, and contributions at the minimum wage all pull that average down. In addition, the coefficient applied to it depends on your contribution time and can fall below 100%. People who ended their careers with high pay but contributed little before that usually feel this difference in the amount they finally receive.

Is it worth contributing higher amounts close to retirement?

It can be, but there is no automatic gain. Because the current rule uses all contributions in the average, high payments at the end of a career raise the result, although they share the average with the older, lower amounts. The real effect depends on your complete history and the contribution time you have accumulated. Before increasing your contribution base, the best approach is to simulate the impact on the benefit base, since the INSS cap limits the maximum amount you can reach.

As informações deste artigo são de caráter informativo e não substituem consulta jurídica individualizada. Cada caso possui particularidades que exigem análise específica.