Mortgage Education Center

    Learn about mortgage concepts and how different factors affect your loan.

    Repayment Models
    Different methods of structuring loan payments over time, affecting how principal and interest portions are calculated and how total payments change throughout the loan term.

    Impact

    The repayment model significantly affects your monthly cash flow, total interest paid, and how quickly you build equity in your home.

    Example

    Equal installments keep your payment the same throughout the loan, while decreasing installments start higher but decrease over time, potentially better matching income that increases with inflation.

    Related Terms

    Equal Installments (Annuity)
    Decreasing Installments
    Amortization
    Overpayments
    Additional payments made beyond the required monthly payment, applied directly to reduce the principal balance of your loan.

    Impact

    Overpayments reduce the principal faster, saving interest and potentially shortening the loan term significantly. Even small regular overpayments can have a dramatic effect over time.

    Example

    Paying an extra 200 per month on a 30-year 300,000 mortgage at 4% could shorten the term by 8 years and save over 60,000 in interest.

    Related Terms

    Principal
    Interest
    Loan Term
    Interest Rate Changes
    Variations in the interest rate applied to your mortgage, either through refinancing, adjustable-rate mortgages, or predefined rate periods.

    Impact

    Even small changes in interest rates can significantly affect total interest paid over the life of a loan and your monthly payment amount.

    Example

    A 1% reduction in interest rate on a 300,000 30-year mortgage could save over 60,000 in total interest and reduce monthly payments by approximately 170.

    Related Terms

    Interest Rate Periods
    Annual Percentage Rate (APR)
    Additional Mortgage Costs
    Various fees and expenses beyond the principal and interest that contribute to the total cost of a mortgage.

    Impact

    Additional costs can significantly increase the effective cost of borrowing and should be considered when comparing loan options or calculating the true cost of homeownership.

    Example

    On a 300,000 mortgage, additional costs might include a 3,000 origination fee, 1,500 annual property insurance, 3,600 annual property taxes, and potentially 1,800 annual PMI.

    Related Terms

    Origination Fee
    Loan Insurance
    Early Repayment Fee
    Annual Percentage Rate (APR)
    Amortization Schedule
    A complete table showing the scheduled payments for a mortgage, including how each payment is divided between principal and interest, and the remaining balance after each payment.

    Impact

    Understanding your amortization schedule helps you see how much of your payment goes to interest versus principal at different points in the loan, and how additional payments would affect the loan.

    Example

    An amortization schedule would show that in the first payment of a 30-year 300,000 mortgage at 4%, about 1,000 goes to interest and only 432 to principal, while in year 25, about 300 goes to interest and 1,132 to principal.

    Related Terms

    Amortization
    Principal
    Interest
    Comparative Mortgage Analysis
    The process of evaluating different mortgage scenarios to determine which option provides the best financial outcome based on your specific circumstances and goals.

    Impact

    Comparing different loan terms, interest rates, and repayment strategies can help you save tens of thousands over the life of your mortgage.

    Example

    Comparing a 30-year mortgage at 4% with a 15-year at 3.5% shows the 15-year option saves over 150,000 in interest but requires about 700 more in monthly payments.

    Related Terms

    Break-Even Point
    Loan Term
    Interest Rate Periods

    All figures are shown in your own currency.

    The 15-year shock
    On a 300,000 loan at 6%, slide the term down and watch the monthly payment barely move while the interest collapses.

    Baseline: Based on a 300,000 loan at 6% over 30 years

    15

    A 15-year term adds only 732.92 a month over the 30-year payment, yet erases 191,832.13 of interest. A shorter term is mostly cheaper, not mostly painful.

    Monthly (baseline)/mo
    1,798.65
    Monthly (this scenario)/mo
    2,531.57
    Interest saved
    191,832.13
    Time saved
    15 years
    Total interest (baseline) - lifetime347,514.88
    Total interest (this scenario) - lifetime155,682.75

    191,832.13 less interest

    Every point hurts
    See how a single percentage point of interest rate reshapes the lifetime cost of the same 300,000 loan.

    Baseline: Based on a 300,000 loan at 6% over 30 years

    7%

    At 7% the loan costs 418,526.25 in interest versus 347,514.88 at 6%. The rate you shop for moves more money than almost anything else.

    Monthly (baseline)/mo
    1,798.65
    Monthly (this scenario)/mo
    1,995.91
    Extra interest
    +71,011.37
    Time saved
    No change
    Total interest (baseline) - lifetime347,514.88
    Total interest (this scenario) - lifetime418,526.25

    71,011.37 more interest

    The extra payment that pays you back
    Add a small recurring overpayment to the 300,000 loan and see how much principal you stop feeding to interest.

    Baseline: Based on a 300,000 loan at 6% over 30 years

    200

    Adding 200 a month - about 11% on top of the payment - lifts your monthly outlay to 1,998.65 but erases 10 years 10 months and saves 140,782.22 in interest, far more than the extra you actually pay, because you kill principal before it compounds.

    Monthly (baseline)/mo
    1,798.65
    Monthly payment + extra/mo
    1,998.65
    Interest saved
    140,782.22
    Time saved
    10 years 10 months
    Total interest (baseline) - lifetime347,514.88
    Total interest (this scenario) - lifetime206,732.66

    140,782.22 less interest

    The quiet drain you can switch off
    A small monthly insurance line looks harmless next to the payment. Slide it up to see the lifetime drain - and what cancelling at 20% equity saves.

    Baseline: Based on a 300,000 loan at 6% over 30 years

    150

    A 150 insurance line quietly adds 54,000.00 over the loan and lifts the true cost to 6.76% APR. Cancelling once you reach 20% equity saves about 33,000.00.

    Headline rate
    6%
    True cost (APR)
    6.76%
    Lifetime insurance cost - lifetime
    54,000.00
    Saved by dropping early
    33,000.00
    The rate isn't the cost
    An up-front fee does not change the headline rate, but it does change what you really pay. Slide the fee to watch the APR move.

    Baseline: Based on a 300,000 loan at 6% over 30 years

    1%

    A 1% origination fee leaves the headline rate at 6% but pushes the true cost to 6.09% APR. The advertised rate is never the whole story - compare offers on APR.

    Headline rate
    6%
    True cost (APR)
    6.09%

    Frequently Asked Questions About Mortgages