Calculadora de Hipoteca de Tasa Ajustable Gratis

Calcula pagos de hipotecas ARM con período fijo inicial y ajustes periódicos de tasa. Compara escenarios.

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ARM Initial Payment

$2,334.29

Estimated Payment After Adjustment$2,802.64
Fixed Rate Payment (comparison)$2,594.39
Monthly Savings During Fixed Period$260.10
Total Savings During Fixed Period$15,606
Balance at Rate Adjustment$371,049

ARM Initial Payment vs Initial Fixed Period

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Fórmula

Adjustable-Rate Mortgage (ARM)

An ARM starts with a lower fixed rate for an initial period, then adjusts periodically based on a market index plus a margin.

Common ARM Structures

  • 5/1 ARM: Fixed for 5 years, adjusts annually
  • 7/1 ARM: Fixed for 7 years, adjusts annually
  • 10/1 ARM: Fixed for 10 years, adjusts annually

    • Rate Caps

    ARMs have caps limiting rate changes:

  • Initial cap: Maximum first adjustment (typically 2%)
  • Periodic cap: Maximum annual adjustment (typically 2%)
  • Lifetime cap: Maximum over loan life (typically 5-6%)

    • When an ARM Makes Sense

  • You plan to sell or refinance before the fixed period ends
  • You want to maximize cash flow in the early years
  • You believe rates will stay stable or decrease

    • Ejemplo Resuelto

    A $400,000 loan. 5/1 ARM at 5.75% initial, expected adjustment to 7.75%. Comparable 30-year fixed at 6.75%.

    1. 01ARM initial payment (5.75%, 30-year amortization): $2,334.29
    2. 02Fixed rate payment (6.75%): $2,594.26
    3. 03Monthly savings during initial period: $2,594.26 - $2,334.29 = $259.97
    4. 04Total savings over 5 years: $259.97 x 60 = $15,598
    5. 05Balance at year 5: approximately $371,342
    6. 06Adjusted payment at 7.75% for remaining 25 years: $2,803.14

    Preguntas Frecuentes

    What determines my ARM rate after the fixed period?

    The adjusted rate equals the index (such as SOFR or 1-year Treasury) plus the lender margin (typically 2.25-2.75%). Rate caps limit how much it can change at each adjustment and over the loan life.

    Can I refinance before the ARM adjusts?

    Yes, many ARM borrowers plan to refinance into a fixed-rate mortgage before the adjustment. This strategy works if rates are favorable and you have sufficient equity. Factor in closing costs when evaluating this plan.

    What is the worst case with an ARM?

    The worst case is hitting the lifetime cap. On a 5.75% ARM with a 5% lifetime cap, the maximum rate would be 10.75%. On $400,000, that could mean payments over $3,500/month. Always stress-test the worst-case scenario.

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