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FINANCE CALCULATOR

Loan Overpayment Calculator

Calculate how much interest you can save by making extra payments on your loan. See time and money savings from overpayments

Calculator

Total amount of the loan

Annual interest rate

Original loan term in years

Additional payment amount

How often you make extra payments

How to Calculate

  • 1Enter your loan amount
  • 2Input the annual interest rate
  • 3Specify the original loan term in years
  • 4Enter the extra payment amount you plan to make
  • 5Select payment frequency (monthly extra payments or one-time payment)
  • 6Click 'Calculate' to see your savings
  • 7Review the interest saved and time saved on your loan
  • 8Compare different extra payment amounts to find the best strategy

Calculation Examples

Mortgage with Extra Monthly Payments

Input Values

Loan Amount: 200,000$
annual Interest Rate: 5.5
Loan Term: 30years
extra Monthly Payment: 100
Payment Frequency: monthly
loan Type: annuity

Calculation Steps

  1. Loan amount: $200,000
  2. Interest rate: 5.5% APR
  3. Loan term: 30 years
  4. Monthly interest rate: 5.5% ÷ 12 = 0.4583% = 0.004583
  5. Number of payments: 30 years × 12 = 360 payments
  6. Standard monthly payment: M = P × [r(1+r)^n] / [(1+r)^n - 1]
  7. M = $200,000 × [0.004583 × (1.004583)^360] / [(1.004583)^360 - 1]
  8. Standard payment: $1,135.58
  9. Total standard payment: $1,135.58 × 360 = $408,808.80
  10. Total standard interest: $408,808.80 - $200,000 = $208,808.80
  11. With extra $100/month: Payment = $1,135.58 + $100 = $1,235.58
  12. Extra payments reduce principal faster, shortening loan term
  13. Estimated interest saved: ~$30,000+
  14. Estimated time saved: ~5 years (loan paid off in ~25 years instead of 30)
  15. Note: Even small extra payments ($100/month) save significant interest on long-term loans

Calculated Results

Calculation not available. Showing fallback result below.

Extra Monthly Payments

Input Values

Loan Amount: 150,000$
annual Interest Rate: 6
Loan Term: 20years
extra Monthly Payment: 200
Payment Frequency: monthly
loan Type: annuity

Calculation Steps

  1. Loan amount: $150,000
  2. Interest rate: 6% APR
  3. Loan term: 20 years
  4. Monthly interest rate: 6% ÷ 12 = 0.5% = 0.005
  5. Number of payments: 20 years × 12 = 240 payments
  6. Standard monthly payment: $1,074.65
  7. Total standard payment: $1,074.65 × 240 = $257,916.00
  8. Total standard interest: $257,916.00 - $150,000 = $107,916.00
  9. With extra $200/month: Payment = $1,074.65 + $200 = $1,274.65
  10. Extra payments accelerate principal reduction
  11. Estimated interest saved: ~$25,000+
  12. Estimated time saved: ~4 years (loan paid off in ~16 years instead of 20)
  13. Note: Larger extra payments ($200/month) provide more significant savings

Calculated Results

Calculation not available. Showing fallback result below.

One-time Extra Payment

Input Values

Loan Amount: 300,000$
annual Interest Rate: 4.5
Loan Term: 30years
extra Monthly Payment: 0
Payment Frequency: monthly
loan Type: annuity

Calculation Steps

  1. Loan amount: $300,000
  2. Interest rate: 4.5% APR
  3. Loan term: 30 years
  4. Standard monthly payment: $1,520.06
  5. Total standard payment: $1,520.06 × 360 = $547,221.60
  6. Total standard interest: $547,221.60 - $300,000 = $247,221.60
  7. One-time extra payment: $10,000 (applied to principal)
  8. New principal balance: $300,000 - $10,000 = $290,000
  9. With reduced principal, less interest accrues over remaining term
  10. Estimated interest saved: ~$15,000+
  11. Estimated time saved: ~1.5 years
  12. Note: One-time payments have immediate impact but monthly extra payments provide ongoing savings

Calculated Results

Calculation not available. Showing fallback result below.

Auto Loan with Extra Payments

Input Values

Loan Amount: 25,000$
annual Interest Rate: 5
Loan Term: 5years
extra Monthly Payment: 50
Payment Frequency: monthly
loan Type: annuity

Calculation Steps

  1. Loan amount: $25,000
  2. Interest rate: 5% APR
  3. Loan term: 5 years
  4. Monthly interest rate: 5% ÷ 12 = 0.4167% = 0.004167
  5. Number of payments: 5 years × 12 = 60 payments
  6. Standard monthly payment: $471.78
  7. Total standard payment: $471.78 × 60 = $28,306.80
  8. Total standard interest: $28,306.80 - $25,000 = $3,306.80
  9. With extra $50/month: Payment = $471.78 + $50 = $521.78
  10. Extra payments reduce loan term and total interest
  11. Estimated interest saved: ~$600+
  12. Estimated time saved: ~6 months
  13. Note: Even on shorter-term loans, extra payments save interest

Calculated Results

Calculation not available. Showing fallback result below.

Frequently Asked Questions

Find answers to common questions about using this calculator. If you have additional questions, feel free to explore the examples above or contact our support team.

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