Just looked back at where mortgage rates were sitting in June 2023 and thought it was worth sharing what I learned about how these things work. Back then, 30-year fixed rates were hovering around 7.28%, which honestly seemed pretty high at the time. The 15-year options were lower at 6.43% if you wanted to pay things off faster. What caught my attention was how quickly these shift - rates moved like 0.04% in a week, which doesn't sound like much until you do the math on what it actually costs you monthly.

So I ran some numbers using a basic mortgage calculator. On a 100k loan at that 7.28% rate, you're looking at about 684 bucks a month just in principal and interest. Over 30 years that adds up to over 146k in total interest alone. The jumbo mortgage rates were actually a bit lower at 6.93% around the same time, which was interesting.

The thing that made sense to me was stepping back and figuring out what you can actually afford before jumping into rate shopping. A lot of people don't think about their debt-to-income ratio, credit score, or how much they have saved for a down payment. Those matter way more than chasing the perfect rate. If you're considering refinancing or shopping for a mortgage, pulling your own numbers through a calculator beats just looking at headline rates. Input your home price, down payment, the rate, loan term, and any fees - gives you a real picture of what you're actually paying.