Most people sign their mortgage paperwork, note their monthly payment, set up autopay — and that's the last time they think about it for 30 years.
But if you have a bit of extra money each month, you could put it towards your mortgage and save thousands of dollars in interest and shave years off your loan.
You just need to know how mortgage interest is calculated and how it can work better for you.
How Mortgage Interest Works
When you take out a mortgage, your lender charges you interest on the outstanding balance — the amount you still owe.
In the early years of your mortgage, the vast majority of each monthly payment goes toward interest, not the principal (the actual amount you borrowed). This is why paying off a mortgage can feel like you're barely making a dent at first.
Let’s say you get a $450,000 home loan at 6% interest for 30 years. Your fixed monthly payments are $2,697.
But there's a kicker. Over the life of that loan, you'll pay roughly $971,000 in total.
That means you're paying more than $520,000 in interest on top of the original $450,000 you borrowed!
Interest on a fixed-rate mortgage is calculated monthly based on your remaining balance. The lower the balance, the less interest you owe — which means every extra dollar you put toward principal today saves you a large amount in interest tomorrow.
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The Power of $10 a Day
But what happens if you pay just $10 extra per day — or about $300 more per month — on that same $450,000 mortgage?
- You’ll save approximately $137,000 in interest over the life of the loan.
- Your loan will be paid off in 23 years instead of 30.
Why such a big impact from such a small change? Because every extra dollar you pay reduces your principal balance immediately.
A lower balance means less interest accrues the following month. Less interest means more of your regular payment goes toward the principal.
It creates a compounding effect that accelerates over time in your favor.
How to Make Extra Payments
Most lenders allow you to make additional principal payments easily. Just make sure your extra payment is applied to the principal balance, not to your next month's payment.
Contact your lender or check your online account to confirm how to designate extra payments correctly.
You can structure extra payments in a few ways:
- Monthly: Add a fixed amount to each regular payment (e.g., an extra $300/month).
- Annually: Make one lump-sum principal payment per year using a bonus or tax refund.
- Bi-weekly payments: Pay half your monthly amount every two weeks, which results in 13 full payments per year instead of 12.
All of these strategies reduce your principal faster and cut your total interest paid.
RELATED: How To Lower Your Monthly Mortgage Payment
What to Consider Before Paying More
Before you send extra money to your mortgage every month, you need to consider a few things.
1. Prepayment penalties
Some mortgages include a prepayment penalty clause that charges a fee if you pay down your loan too quickly.
Check your loan documents or call your lender before making large extra payments.
2. Opportunity cost
Money you put toward your mortgage is money you're not investing elsewhere.
If your mortgage interest rate is 6% but your investment portfolio historically returns 8–10%, you might build more wealth by investing that $300/month instead.
This comes down to your personal risk tolerance, financial goals, and how much value you place on being debt-free.
READ MORE: Should You Pay Off Debt or Invest?
3. Liquidity
Once you pay money into your home's equity, you can't access it easily without refinancing or taking out a home equity loan.
If you don't have a solid emergency fund, make sure that's fully funded before directing extra cash to your mortgage.
4. Tax implications
If you itemize deductions, mortgage interest may be tax-deductible.
Reducing your interest payments could slightly reduce that deduction — though for most people, the interest savings far outweigh any tax impact.
FAQs
Can I make extra payments if I have an FHA or VA loan?
Yes, both FHA and VA loans allow extra payments without penalty. The same rules apply — just make sure your servicer applies the extra amount to your principal balance.
What if I can't afford $300 extra every month on my mortgage payment?
Any extra money you can put toward your mortgage’s principal will reduce your interest and shorten your loan term. Even an extra $50 or $100 a month adds up significantly over the life of a loan.
Is it better to make one large extra payment a year or smaller ones monthly?
Monthly extra payments will save you slightly more in interest because your balance drops sooner and has less time to accrue interest. That said, an annual lump sum — like a tax refund — still makes a meaningful difference if monthly isn't feasible.
TL;DR: Save On Your Mortgage
If you can fit it in your budget, paying an extra $10 a day on your mortgage could be an easy way to save yourself a lot of money in the long run.
Just make sure you've checked for prepayment penalties, have your emergency fund in place first, and consider your broader financial picture so that your money is going exactly where you need it most.
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