Mortgage Acceleration Calculator
Calculate time and interest savings with accelerated mortgage payments
Mortgage Acceleration Inputs
Original loan amount or remaining balance
Annual percentage rate (APR)
Half monthly payment every 2 weeks (26 payments = 13 monthly payments)
Advanced Options (Optional)
Upfront payment as percentage of loan
Additional fees added to loan amount
How often interest is compounded
Payment Comparison Summary
| Payment Type | Standard Monthly | Accelerated Payment | Difference |
|---|---|---|---|
| Payment | $2,097.644 | $1,048.822 bi-weekly | $174.804 more per month |
| Term | 30 years 0 months | 23 years 3 months | 6 years 8 months saved |
| Payoff Date | 9/4/2055 | 12/4/2048 | 6y 8m earlier |
| Total Interest | $455,151.669 | $334,854.47 | -$120,297.199 |
| Total Payments | $755,151.669 | $635,585.988 | -$119,565.681 |
Annual Balance Comparison (First 10 Years)
| Year | Standard Balance | Accelerated Balance | Standard Interest | Accelerated Interest | Interest Savings |
|---|---|---|---|---|---|
| 1 | $297,234.497 | $293,051.738 | $22,406.219 | $30,809.322 | $-8,403.103 |
| 2 | $294,254.3 | $285,344.282 | $22,191.526 | $30,050.128 | $-7,858.602 |
| 3 | $291,042.743 | $276,794.68 | $21,960.165 | $29,207.981 | $-7,247.815 |
| 4 | $287,581.865 | $267,310.914 | $21,710.844 | $28,273.817 | $-6,562.974 |
| 5 | $283,852.31 | $256,790.914 | $21,442.167 | $27,237.584 | $-5,795.417 |
| 6 | $279,833.219 | $245,121.458 | $21,152.632 | $26,088.128 | $-4,935.496 |
| 7 | $275,502.116 | $232,176.952 | $20,840.619 | $24,813.077 | $-3,972.458 |
| 8 | $270,834.779 | $217,818.078 | $20,504.385 | $23,398.71 | $-2,894.325 |
| 9 | $265,805.103 | $201,890.297 | $20,142.047 | $21,829.803 | $-1,687.756 |
| 10 | $260,384.961 | $184,222.184 | $19,751.58 | $20,089.471 | $-337.89 |
Mortgage Acceleration Formula
Accelerated Payment Formula
P = A × i × (1+i)^(n×12) / [(1+i)^(n×12) - 1] × (1/w)
P = Accelerated payment amount
A = Loan amount
i = Periodic interest rate
n = Number of years
w = Payment frequency factor (2 for bi-weekly, 4 for weekly)
Acceleration Types
Accelerated Bi-weekly: Half monthly payment every 2 weeks = 13 monthly payments/year
Standard Bi-weekly: Same annual total as monthly, paid over 26 periods
Accelerated Weekly: Quarter monthly payment every week = 13 monthly payments/year
Monthly Extra: Regular monthly payment plus additional principal
Acceleration Options
Accelerated Bi-weekly
Fastest savings, 1 extra payment/year
★ Most Popular
Accelerated Weekly
Maximum acceleration option
Standard Bi-weekly
Same annual total, different schedule
Monthly Extra
Flexible additional payments
Benefits of Acceleration
Pay off mortgage years earlier
Save thousands in interest payments
Build equity faster
Reduce financial stress
Consider opportunity cost of investments
Understanding Mortgage Acceleration
How Acceleration Works
Mortgage acceleration strategies help you pay off your loan faster by increasing payment frequency or adding extra principal payments. Even small increases can lead to significant savings over time.
Accelerated vs Standard Bi-weekly
- •Accelerated: Half monthly payment every 2 weeks (26 payments = 13 monthly)
- •Standard: Same annual total as monthly, divided into 26 payments
- •Result: Accelerated saves more through extra principal payments
Example: $300,000 at 7.5% for 30 years
Standard Monthly
$2,098/month × 360 payments = $755,152 total
Accelerated Bi-weekly
$1,049 bi-weekly × ~607 payments = $633,045 total
Saves: $122,107 and 6 years 9 months
Consider: Compare potential investment returns vs. guaranteed mortgage savings. If you can earn more than your mortgage rate in investments, paying extra may not be optimal.