The Selic rate: how it reaches credit and the economy

When the Copom (Monetary Policy Committee of the Banco Central do Brasil) changes the Selic, Brazil’s benchmark interest rate, the news comes out the same day. The effect on your loan, the price of a car or your job does not. This article explains the path from one to the other: the so-called monetary policy transmission mechanism.

Who the Copom is, how it meets and why the Central Bank has inflation targets has already been explained in What central banks are and how they work. Here the focus is on what happens after the decision.

Where the Selic stands today

At its 281st meeting, concluded on September 16, 2026, the Copom unanimously cut the Selic target to 13.75% a year, according to the Central Bank’s official statement. That is the level in force on October 8, 2026, the date this article was checked.

The historical series of the Selic target in the Central Bank’s Time Series Management System (SGS) shows the recent path: the rate stayed at 15.00% from June 2025 to March 2026 and, from then on, was cut at five consecutive meetings (14.75%, 14.50%, 14.25%, 14.00% and 13.75%).

This article makes no forecast about upcoming decisions. In the statement itself, the Copom says the total size of the cycle will be defined “in light of new information”.

The path in one sentence

A box in the June 1999 Inflation Report, published at the start of Brazil’s inflation-targeting regime, sums up the chain. There are five main transmission channels: interest rates, credit, the exchange rate, asset prices and expectations. By moving these variables, monetary policy influences the saving, investment and spending of people and companies. This affects aggregate demand (total spending in the economy) and, finally, inflation.

The same document makes two caveats that remain useful. First, economists agree on the direction of the effects (higher interest rates tend to slow activity and inflation in the short term), but disagree about their size. Second, the importance of each channel changes as the economy changes.

Below, each channel is illustrated with an interest rate increase. With a cut, the direction tends to reverse.

Channel 1: other interest rates in the economy

The Central Bank directly controls a very short-term rate. According to the IMF, central bank operations affect short-term interest rates, which influence longer-term rates and, later, economic activity.

In practice, when the Selic rises, the cost of money for banks and the yield on government bonds rise. Banks pass part of this on to loans. The 1999 box highlights the central point: because prices are slow to adjust, a rise in the nominal rate also raises the real interest rate (the interest rate net of inflation). And it is the real rate that weighs on the decision to invest.

With a higher real interest rate, these become more expensive:

• business investment in machinery, construction and inventories;
• household purchases of durable goods (cars, appliances, homes), which the Central Bank treats as a kind of household investment.

The Federal Reserve, the US central bank, describes the same mechanism in the opposite direction: lower interest rates on consumer loans stimulate purchases, especially of durables, and lower mortgage rates make it easier to buy homes and refinance debt.

Channel 2: credit and the spread

The rate you pay is not the Selic. It adds two parts:

• the bank’s funding cost, which tracks the Selic more closely;
• the spread, the difference between what the bank charges and what it pays to raise funds. It covers defaults, administrative expenses, taxes and the bank’s margin.

The Central Bank’s figures show this gap. In August 2026, the average interest rate on credit operations (total, including non-earmarked and earmarked credit) was 32.26% a year, and the average spread was 21.16 percentage points. The Selic target, in the same month, went from 14.25% to 14.00%.

The same data illustrate that pass-through is not immediate. The average credit rate was 32.84% in March 2026, the month of the first cut, reached 33.36% in April and fell to 32.26% in August. In other words: after 1.00 percentage point of Selic cuts through August, the average credit rate was about 0.6 point below its March level. This comparison is descriptive. It does not isolate the Selic from other factors, such as default risk and changes in the type of credit taken out.

The credit channel also has a quantity effect, not just a price effect. Higher interest rates tend to reduce how many installments fit in a budget and how many applications the bank approves. The 1999 box points out that bank credit matters more for small businesses, which cannot finance themselves by issuing shares or debentures.

To understand why small rate differences turn into large debt differences over time, see Compound interest: how it works in practice.

Channel 3: the exchange rate

Higher interest rates in Brazil, compared with those in other countries, tend to attract capital and strengthen the real. According to the IMF, a country’s interest rates affect the value of its currency.

The Central Bank box describes three effects of a stronger real:

• direct: imported products and commodities become cheaper in reais. This is the fastest effect on prices;
• costs: products made in Brazil with imported inputs become cheaper to produce;
• demand: cheaper imports take some demand away from domestic products, which reduces price pressure.

The exchange rate also depends on external factors, such as US interest rates and global risk appetite. In its September 2026 statement, the Copom cites a “persistently more depreciated” exchange rate among the upside risks to inflation. The relationship between interest rates in various countries and assets is the subject of Global interest rates and their effects on assets.

Channel 4: asset prices and wealth

When interest rates fall, fixed-rate bonds already issued tend to gain value, and shares may become more attractive compared with fixed income. Those who hold these assets feel wealthier and may spend more. The Fed describes this wealth effect for the US economy.

The 1999 box considered this channel of little relevance in Brazil at the time, for lack of evidence. That assessment is more than 25 years old. The editorial team did not find, in the sources consulted, a recent official estimate of the weight of this channel in Brazil.

Channel 5: expectations

The mere expectation of a change in the Selic already moves the economy. Market interest rates may adjust before the Copom announces its decision, the Central Bank box notes.

Expectations also weigh on price setting. If companies and workers believe inflation will fall, they tend to adjust prices and wages more moderately. In the September 2026 statement, expectations from the Focus survey (the Central Bank’s weekly poll of market forecasters) stood at 4.9% for 2026 and 4.3% for 2027, above the target. The Copom says it monitors the de-anchoring of expectations because it “increases the cost of disinflation”: interest rates would need to stay high for longer to bring inflation back down. Why high inflation is costly is explained in Inflation: causes, measures and consequences.

Why the effect takes time

The channels do not act at the same time. The exchange rate can reach the prices of imported products relatively quickly. Investment, durable goods consumption and employment react more slowly, because contracts, plans and loans already under way do not change overnight.

That is why the Copom decides by looking ahead. In the September 2026 statement, the “relevant horizon” for monetary policy was the first quarter of 2028, for which the committee projected inflation of 3.2% in the reference scenario. In the editorial team’s reading, deciding today with a horizon of about a year and a half reflects precisely the delay in transmission.

There are also factors that can disrupt the path. The Copom itself points out that stimulus to demand, particularly consumption, can weaken “part of the usual channels of monetary policy transmission”. And the 1999 box notes that shocks outside the Central Bank’s control, such as a crop failure or a tax increase, also move prices in the short term.

What this means for you

Some practical consequences, with no forecast about the direction of interest rates:

• Floating-rate debt (linked to the CDI, Brazil’s interbank deposit rate, or to the Selic) reacts faster to Copom decisions. Fixed-rate debt keeps the contracted rate.
• Expensive credit lines, such as revolving credit card balances and overdrafts, depend much more on the spread than on the Selic. A 0.25-point cut in the Selic changes little on these lines.
• Floating-rate investments tend to track the Selic and the CDI. Fixed-rate bonds and shares fluctuate in price when interest rate expectations change, and may produce losses if sold before maturity or at an unfavorable time.
• Employment and income are affected through the activity side, with a lag. According to the statement, the September decision also implies smoothing fluctuations in activity and fostering full employment, without prejudice to the goal of price stability.

For the place of the Selic within the broader set of banks, markets and regulators, see How the modern financial system works.

Key takeaways

• The Selic is the starting rate. It reaches the economy through market interest rates, credit, the exchange rate, asset prices and expectations.
• The rate on your loan adds the funding cost and a spread; in August 2026, the average credit rate was 32.26% a year, with an average spread of 21.16 points, according to the Central Bank.
• The effects take time and vary by channel. That is why the Copom targets a horizon ahead, and a single decision rarely changes everything right away.