Compound Interest Calculator Mexico City

Compound Interest Calculator for Mexico City

Savings accounts and deposits in Mexico City are priced off the Bank of Mexico policy rate, which stood at 6.5% at the end of September 2026. National consumer price inflation was 3.45% in September 2026, so a saver earning exactly the policy rate would have a real return of 2.94% a year before tax.

Facts that change the answer

• Bank of Mexico policy rate: 6.5% (September 2026, BIS series)
• Annual CPI inflation: 3.45% (September 2026)
• Real return at the policy rate: 2.94% per year (computed as (1 + 6.5%) / (1 + 3.45%) minus 1)
• Policy rate at each December: 2016 5.75%, 2017 7.25%, 2018 8.25%, 2019 7.25%, 2020 4.25%, 2021 5.5%, 2022 10.5%, 2023 11.25%, 2024 10%, 2025 7%
• Policy rate moves since January 2020 (month-end data): February 2020 7.25% to 7%; March 2020 7% to 6.5%; April 2020 6.5% to 6%; May 2020 6% to 5.5%; June 2020 5.5% to 5%; August 2020 5% to 4.5%; September 2020 4.5% to 4.25%; February 2021 4.25% to 4%; June 2021 4% to 4.25%; August 2021 4.25% to 4.5%; October 2021 4.5% to 4.75%; November 2021 4.75% to 5%; December 2021 5% to 5.5%; February 2022 5.5% to 6%; March 2022 6% to 6.5%; May 2022 6.5% to 7%; June 2022 7% to 7.75%; August 2022 7.75% to 8.5%; September 2022 8.5% to 9.25%; November 2022 9.25% to 10%; December 2022 10% to 10.5%; February 2023 10.5% to 11%; March 2023 11% to 11.25%; March 2024 11.25% to 11%; August 2024 11% to 10.75%; September 2024 10.75% to 10.5%; November 2024 10.5% to 10.25%; December 2024 10.25% to 10%; February 2025 10% to 9.5%; March 2025 9.5% to 9%; May 2025 9% to 8.5%; June 2025 8.5% to 8%; August 2025 8% to 7.75%; September 2025 7.75% to 7.5%; November 2025 7.5% to 7.25%; December 2025 7.25% to 7%; March 2026 7% to 6.75%; May 2026 6.75% to 6.5%
• In 9 of the last 10 years the December policy rate was above that year's average inflation

Worked example for Mexico City

Start with MXN 100,000, add MXN 1,000 a month and use 6.5% compounded monthly. After 10 years you would have MXN 359,622 from MXN 220,000 of deposits; after 20 years MXN 856,066 from MXN 340,000. These amounts in Mexican peso are only examples; real deposit rates offered by banks in Mexico City are usually below or above the policy rate depending on the term and the bank.

To see what that balance is worth in today's money, take inflation into account: at 3.45% a year, MXN 359,622 in ten years has the buying power of about MXN 256,060 now. Recent history for Mexico City's currency: 2020: 4.25% rate vs 3.4% inflation, 2021: 5.5% rate vs 5.7% inflation, 2022: 10.5% rate vs 7.9% inflation, 2023: 11.25% rate vs 5.5% inflation, 2024: 10% rate vs 4.7% inflation, 2025: 7% rate vs 3.8% inflation.

If you hold the money in a fixed deposit, the rate you lock in matters more than the compounding frequency. On MXN 100,000 over 10 years at 6.5%, switching from yearly to monthly compounding adds only MXN 3,505, while a rate 1 point higher adds MXN 19,988.

Sources: BIS central bank policy rates · BIS consumer price statistics. Checked 5 November 2026. For how the maths works, see the Compound Interest Calculator guide.