New York mortgage quote: 3.53% fixed for 10 years on a $490,000 purchase

I’m considering a 3.53% mortgage quote with the rate fixed for 10 years on a five-bedroom property purchase around $490,000 in New York. The advertised rate was lower, but the arrangement fees and loan-to-value tier narrowed the difference.

For comparing lenders, would you prioritize APR, interest paid during the 10-year fixed period, or total cash cost including fees? The monthly payment difference is small, so portability and early-repayment terms may matter more. I’m trying to work out what I might be missing before choosing.
 
Compare costs over the period you realistically expect to keep this exact loan, not automatically over its full stated term. Add interest and lender fees, but keep principal repayment separate because it builds equity rather than being a financing cost. APR is a useful first screen; a cash comparison over 10 years is more relevant if that is your likely decision point.
 
Is this a loan fully repaid over 10 years, or a longer-amortization mortgage whose rate changes after year 10? That distinction is crucial. Also, what loan amount and LTV tier are behind the 3.53% quote? Comparing rates without using the same down payment and amortization schedule can give a misleading result.
 
I wouldn’t dismiss APR too quickly. It gives you a common starting figure when one lender advertises a low rate but charges more upfront. Its weakness is that it may not match your actual holding period or refinance plans. I’d compare APR first, then calculate the ten-year cash cost under the exact payment schedule.
 
How firm is the portability language? Is it actually written into the proposed mortgage terms, or was it described more generally? Check what happens if the replacement property costs more, your finances change, or there is a gap between sale and purchase. Portability has little practical value if the conditions make a future transfer uncertain.
 
The refinance assumption deserves its own scenario. Run one case where you refinance or sell at year 10 and another where you cannot do so on attractive terms. For the second case, use the quoted reset method and remaining balance rather than guessing that another inexpensive fixed deal will be available. That exposes the rate-reset risk and the possible payment jump.
 
I’d put more weight on early-repayment flexibility than portability unless the portability provision is unusually clear. You control whether you make extra payments, while moving depends on timing and circumstances. Compare any limits or charges for partial repayment, full payoff, sale, and refinancing. A tiny monthly saving can disappear if the cheaper loan is expensive to exit.
 
Ask each lender for figures using identical assumptions: same loan amount, LTV, amortization, fixed period and comparison date. Then put rate, APR, monthly payment, all upfront lender fees, ten-year interest, remaining balance after ten years, early-repayment terms and portability conditions into one table. That should make the trade-off visible without letting the headline rate dominate.
 
One more affordability point: don’t only compare today’s required payment. Check whether you could still carry the property if the payment rises after the fixed period, including the other ownership costs you already expect. If both offers are comfortably affordable now, the less restrictive contract may reasonably beat a marginally cheaper one.
 
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