Your mortgage rate is set by two layers: the market — Federal Reserve policy, inflation, and the bond market establish the baseline — and your file, where credit score, loan type, term, and down payment move your personal number up or down from that baseline. That is why the advertised rate is never a promise: it describes a borrower who may not be you.

What determines mortgage rates?

The main drivers:

Economic factors: Federal Reserve policies, inflation, and bond markets set the foundation. Strong economies often push rates up.
Credit score: Scores above 740 typically secure the best pricing.
Loan type and term: Conventional, FHA, and 15- vs. 30-year loans carry different rates.
Down payment: Larger down payments often yield better rates.

The parts you control are worth real money: a stronger credit profile can move your rate enough to change what house you can afford.

Fixed or adjustable: how does the choice affect your rate?

You will choose between two structures:

Fixed-rate mortgages: The rate stays constant for the whole term, offering stability — great for long-term owners in steady markets like West Michigan.
Adjustable-rate mortgages (ARMs): A lower initial rate that adjusts after the fixed period — suited to genuinely short-term plans.

An ARM’s introductory rate typically sits below the fixed rate, which is exactly the trade: lower payments now against uncertainty later. Choose on your timeline, not on which number looks smaller today.

How much does the rate actually change your costs?

The math is bigger than most buyers expect. As rough, rate-independent arithmetic:

Monthly payments: Each 1% of rate on a $300,000 loan is worth roughly $180-$200 per month.
Total interest: That same 1% adds on the order of $65,000 across a 30-year term.
Affordability: Higher rates shrink the loan size you qualify for, since lenders test your payment against your income.

In Michigan’s varied markets, that spread is often the difference between neighborhoods.

Should you wait for rates to drop?

Timing the market is tempting but risky:

Unpredictable rates: No one can reliably predict significant drops.
Rising prices: Home prices can climb while you wait, offsetting any rate savings.
Rate locks: We offer locks to protect you from rises between contract and closing.

And refinancing later remains an option if rates genuinely fall.

How do you get the best rate?

Improve credit: Pay down debt to boost your score — our guide on boosting your credit score covers the fastest levers.
Shop around: Compare lenders — then bring us the best quote you get and we will tell you plainly whether we can beat it.
Buy points: Paying upfront to lower your rate can make sense if you will keep the loan long enough to break even.
Choose wisely: Shorter terms often carry lower rates, at the cost of a higher payment.

Why rates matter

Michigan’s market varies, from West Michigan’s growth to Detroit’s revival. A good mortgage rate can:

Make homes affordable.
Free up funds for renovations.
Strengthen offers in competitive areas.

Nationwide, rates shape every homebuying journey — but your rate is shaped by your file, and that part you can work on.

Disclaimer: Information provided is for educational purposes. Consult a mortgage professional for personalized advice.

How Do Mortgage Rates Work? A Simple Guide for Homebuyers