See exactly how much interest you save and how many years you cut off by making extra payments. Compare standard vs. accelerated payoff side by side.
A homeowner with a $300,000 mortgage at 6.5% for 30 years pays an extra $100/month.
Standard Payment: $1,896.58
Interest Saved: ~$32,000 | Payoff Accelerated: ~3.5 years
Just $100 extra per month saves over $30,000 and cuts nearly 4 years off the mortgage.
A borrower with a $400,000 mortgage at 7% for 30 years adds $200/month.
Standard Payment: $2,661.21
Interest Saved: ~$90,000 | Payoff Accelerated: ~6.5 years
Higher rates amplify benefits — at 7%, every extra dollar works harder to save interest.
After a bonus, a homeowner puts $10,000 lump sum on a $350,000 mortgage at 6.25% (30-year).
Standard Payment: $2,154.76
Interest Saved: ~$20,500 | Payoff Accelerated: ~1.5 years
Even a single lump sum makes a meaningful dent, especially early in the loan term.
A homeowner pays $2,400/year extra on a $250,000 mortgage at 5.5% for 30 years.
Standard Payment: $1,419.47
Interest Saved: ~$50,000 | Payoff Accelerated: ~5 years
Annual lump sums work similarly to monthly extras — great for those with annual bonuses.
Making extra mortgage payments is one of the most effective ways to save money. Here are the most common approaches.
Add a fixed amount (e.g., $100, $200) to your regular monthly payment. This is the simplest and most consistent approach.
✓ Pros: Predictable, builds discipline, consistent savings
✗ Cons: Requires ongoing cash flow commitment
Best for: Homeowners with stable monthly income.
Make one additional full payment each year via bi-weekly payments (26 half-payments = 13 full payments) or by making a separate annual payment.
✓ Pros: Significant savings, minimal adjustment to monthly budget
✗ Cons: Bi-weekly may require lender approval
Best for: Those with annual bonuses or wanting set-and-forget.
Apply occasional large payments ($5K–$20K) when you have extra money from bonuses, inheritance, or windfalls.
✓ Pros: Maximum flexibility, large principal dents, no ongoing commitment
✗ Cons: Requires discipline to apply windfalls
Best for: Variable income earners or those with irregular windfalls.
Pay half your extra payment every two weeks, aligning with bi-weekly paychecks for easier budgeting.
✓ Pros: Aligns with pay cycles, manageable per-payment amounts
✗ Cons: More transactions to track
Best for: Bi-weekly earners matching payments to income.
A simple framework to decide whether to put extra money toward your mortgage or invest it:
| Scenario | Recommendation |
|---|---|
| Mortgage rate > 6% | ✅ Pay extra — guaranteed return equals your rate |
| Mortgage rate 4–6% | ⚖️ Either is reasonable — consider splitting |
| Mortgage rate < 4% | 📈 Likely better to invest historically |
| High-interest debt exists | 🔴 Pay off credit cards and high-interest debt first |
Making extra mortgage payments is one of the most powerful financial moves a homeowner can make. Even small additional payments can lead to substantial long-term savings.
Several proven strategies exist for making extra mortgage payments. The best approach depends on your financial situation and goals.
The decision depends on your mortgage rate and personal situation.
Many experts recommend contributing enough to retirement for employer match, building an emergency fund, then splitting extra cash between prepayment and investing.
⚠️ Disclaimer: This calculator is for educational purposes only. Results are estimates based on standard amortization formulas. Actual savings may vary based on loan terms, prepayment penalties, rate changes, and lender policies. This does not constitute financial advice. Consult a qualified professional before making extra mortgage payments.