Loan payoff calculator with extra payment savings

How loan amortization work

When you get loan wey dem go subtract interest from every month, each payment you make go cover the interest and some of the money you actually borrow. At the start of the loan, most of wetin you pay go straight to interest. As time go on and the money you owe reduce, more of each payment go reduce the actual debt.

Na that one make extra payment strong well well at the beginning of loan: every extra naira wey you pay for the actual debt reduce the balance wey them go use calculate future interest, and this thing dey create saving wey multiply itself.

Ways to finish paying your loans faster

• Round up your monthly payment. If you pay ₦450 instead of ₦392, e go add up well well over time.
• Pay every two weeks instead of every month. This one mean say you go pay one extra full payment each year.
• When you get money like bonus or tax refund, put am straight on the actual debt you owe.
• If you get multiple loans, try the avalanche method: pay the minimum for all of them, then put extra money toward the loan wey get the highest interest first.

How interest dey come at the front

The important thing wey you need understand about amortization na how interest come dey plenty at the beginning. On a 30-year mortgage wey get 7% interest, almost half of all the interest wey you go pay the whole time dem go charge am in the first ten years. By the time you don reach the middle of 30-year loan, you just pay like one-third of the actual debt.

Example: A mortgage of ₦300,000 at 7% over 30 years go have monthly payment of about ₦1,996. Throughout the whole time, you go pay ₦418,527 in interest — wey pass the original loan money. In month one, ₦1,750 out of your ₦1,996 payment na interest and only ₦246 reduce the actual debt. By month 360, e reverse: almost everything wey you pay go to the actual debt.

How extra payments work

Extra payments work by reducing the actual debt money immediately. When the debt reduce, less interest go charge every month after that, which mean bigger part of each regular payment go reduce the actual debt — and this speed up when you finish pay. That compounding thing na wetin make small extra payment at the beginning of loan hit different.

Example of extra payment saving on ₦300,000 mortgage at 7% over 30 years:

The saving no be even thing: ₦500 extra save pass 5 times wetin ₦100 extra save, because when you reduce the debt well well at the start, am go grow through the compounding way over all the months wey remain.

Avalanche versus snowball method

When you get multiple loans, two main ways people use:

Avalanche method: Pay the minimum for all loans and put all extra money toward the loan wey get the highest interest. This reduce the total interest wey you go pay and na the best way mathematically. But e fit slow if the loan wey get highest interest also get big balance.

Snowball method: Pay the minimum for all loans and put extra money toward the loan wey get the smallest balance, no matter the interest. When you finish one small loan quick quick, am go make you happy and free up that minimum payment so you fit use am for other place. Research show say snowball method make more people finish their loans if dem struggle with motivation, even though e cost more in interest.

If you just want the math way, use avalanche method. But if you wan succeed because of how you feel, the snowball method psychology benefit fit worth the small extra interest you go pay.

Bi-weekly payments

If you switch from monthly to bi-weekly payments — paying half your monthly payment every two weeks — you go pay 26 half-payments each year, wey be like 13 full monthly payments instead of 12. This one extra payment each year go reduce 30-year mortgage by about 4 to 5 years and save tens of thousands in interest, and you no need add money to each payment.

Not all lenders process bi-weekly payments the correct way. Some go hold the first bi-weekly payment and only use am when the second one come (so e become monthly for real). Check with your lender how dem handle bi-weekly payments before you start.

Things to think about when you refinance

Refinancing mean say you go take new loan to replace the old one, most times at lower interest or for shorter time. The point where you break even — where the interest money wey you save pass the cost wey refinancing cost — depend on how much the interest rate go down and how long you wan stay with am.

Small rule of thumb: refinancing make sense if you can reduce your rate by at least 0.5–1%, you plan to stay for at least 2–3 years, and the break-even time (closing costs ÷ monthly saving) fall inside that window. If you extend the time while you lower the rate, your monthly payment go reduce but the total interest go increase — check both way before you decide.