The genuinely cheaper loan is the one that costs less across the period you hold it. That calculation includes points paid upfront, interest over the hold, any prepayment penalty triggered at exit, and the opportunity cost of capital tied up in reserves.
These questions cover how to think about total cost properly.
Quick answer
Total cost equals points and fees paid at closing, plus interest across your actual hold period, plus any prepayment penalty triggered at exit. A lower rate with high points and a long penalty can cost more than a higher rate with neither.
Frequently Asked Questions
What makes up the total cost of a loan?
Origination points and lender fees at closing, interest paid over your holding period, any prepayment penalty if you exit early, and the opportunity cost of capital held in reserves.
Why is hold period so important to the calculation?
Because upfront costs amortize over the period you hold. Two points is expensive over two years and reasonable over ten. Your hold assumption drives everything.
How do I calculate total cost?
Add closing costs and points, plus total interest over your expected hold, plus any prepayment penalty at your expected exit. Compare that figure across offers.
Should I include reserves in the cost?
Not as a direct cost, since you keep the money. But capital held in reserves cannot fund another deal, so there is a genuine opportunity cost at scale.
Does a lower rate always mean lower total cost?
No. A lower rate purchased with points and a long prepayment penalty can cost more than a higher rate with neither, particularly on a short hold.
How does the prepayment penalty factor in?
If you will trigger it, add it to total cost. If you genuinely will not, it costs nothing and may have bought you a better rate. Be honest about which applies.
What is the break-even on points?
Divide the point cost by the monthly payment saving. That gives the months needed to recover the upfront expense. Compare it to your hold plan.
Does total cost include property expenses?
Not the loan cost specifically, though your overall return calculation should include taxes, insurance, maintenance, vacancy, and management. Loan cost is one component of the investment.
How do I compare a five-year and thirty-year cost view?
Run both. If your plan is a five-year hold, the thirty-year figure is irrelevant. If you are uncertain, model both and see how sensitive the comparison is to the assumption.
Does refinancing later change the calculation?
Yes. If you plan to refinance in three years, only three years of interest plus any penalty are relevant, not thirty years of interest.
What about the cost of a rate increase on an ARM?
Model it at the caps. Total cost on an ARM should be calculated at your realistic expectation and again at the lifetime cap to understand the range.
How does leverage affect total cost?
Higher leverage means more interest paid on a larger balance, though less capital committed. Lower leverage costs less in interest but ties up more of your own money.
Should I include the tax effect?
Interest on investment property is generally deductible, which reduces the after-tax cost. Your effective cost depends on your tax position — a CPA can quantify it for your situation.
Do closing costs vary enough to matter in comparison?
Sometimes. Lender fees and points vary meaningfully between lenders. Third-party costs like title and appraisal are more similar.
What is the single most overlooked cost?
The prepayment penalty, by a considerable margin. Investors compare rates carefully and skim the penalty term, then discover it when refinancing.
How do I account for uncertainty in my hold period?
Model a range. If the comparison flips depending on whether you hold three or seven years, the option that is less sensitive to the assumption is often the safer choice.
Does the cheapest loan always make the best deal?
No. A cheaper loan that will not close, or one with terms that block your strategy, is worse than a slightly more expensive one that works.
How does total cost relate to my return?
Loan cost is a direct input to your cash flow and therefore your return. Lower cost improves returns, but only if the loan structure also supports your strategy.
What should I do before signing?
Calculate total cost across your realistic hold for each offer, confirm the prepayment terms against your exit plan, and verify the reserve requirement fits your capital position.
What is the simplest way to compare properly?
Ask each lender for rate, points, prepayment structure, reserves, and maximum leverage on your specific file. Then apply your hold period to all of them consistently.
