The True Cost of Your Mortgage in Year One Will Shock You

The average 30-year fixed mortgage rate sits around 6.5%. On a $400,000 loan, here is what you would pay (figures rounded; exact cents vary slightly by servicer rounding).

You borrow $400,000. You pay back about $910,178 over 30 years. The difference - about $510,178 - goes to your lender as interest. That is not a glitch or a scandal; it is how amortization works. But many buyers never see this number written out before they sign.

This is the part that surprises almost everyone. In the first month of your mortgage, here is how your payment is split (using the same 6.5% loan):

In your very first payment, about 86% goes to your lender as interest. Just about 14% reduces your debt.

By the end of Year 1, having made 12 payments totaling about $30,339:

This is not a flaw - it is how amortization is designed. But knowing it changes how you think about the decision.

The mortgage payment is only part of what owning a home costs. According to Bankrate's 2025 Hidden Costs of Homeownership study, the average American homeowner pays approximately $21,400 per year in costs beyond their mortgage - including property taxes, insurance, maintenance, and utilities.

Add those to a $400,000 mortgage and Year 1 looks like this (illustrative; your county and home condition will differ):

Of that total, only about $4,471 went toward building loan principal in Year 1. The rest - upward of $37,700 in the lower maintenance scenario, and more if maintenance runs high - is money spent on housing and ownership, not automatic "equity" in the sense of loan balance reduction.

Your mortgage amortization schedule has a crossover point - the month when your principal payment finally exceeds your interest payment. On a $400,000 loan at 6.5% with a standard 30-year schedule, that happens around Month 233 - about 19 and a half years into the loan. For the years before that, more of each payment goes to interest than to principal. The math gets better over time - but slowly.

Here is how cumulative interest and cumulative principal paid stack up at the same rate and payment (rounded to the nearest dollar):

Making one extra mortgage payment per year - applied entirely to principal - is one of the most effective and underused strategies in personal finance. The impact is often large relative to the effort.

On a $400,000 loan at 6.5%, with numbers consistent with the schedule above:

Use HelpCalculate's Extra Mortgage Payment calculator to enter your current balance, rate, and time left, then model one-time, monthly, or annual extra principal and see interest saved and payoff time. For a full monthly payment estimate including taxes and insurance, use the Mortgage Payment calculator.

None of this is an argument against buying a home. Homeownership builds long-term wealth, provides stability, and protects against rising rents. The point is not to dissuade you - it is to ensure you go in with accurate expectations.

The first few years of a mortgage feel like slow going because they are slow going. Equity builds gradually at first, then accelerates. Year 10 and beyond is where ownership often starts to feel more clearly in your favor.

Know the numbers. Plan around them. And if you are buying, consider making one extra principal payment in Year 1 - it is one of the highest-return moves available to a new homeowner, assuming your budget and emergency fund are already in good shape.