Points and Buydowns on Investment Loans: Break-Even Math

Mortgage points are worth considering when the savings over the life of your actual loan exceed the extra upfront cost and leave enough cash for the property. In the hypothetical comparison below, paying $2,400 reduces monthly principal and interest by about $60. The simple cash break-even arrives with payment 41. Refinancing after two years produces a different result from keeping the loan for seven.

Start with two written quotes for the same property, principal, amortization period and rate-lock date. A point does not buy a universal reduction in rate. The lender's pricing determines the exchange. The CFPB explanation of points and lender credits describes that trade: one point is 1% of principal, paid upfront for the quoted discount. Compare the complete offers, not a rate advertised without its fee assumptions.

What the extra cash buys

Use a fictional $320,000 rental purchase with $80,000 down and a $240,000 loan. Both quotes are fully amortizing over 30 years. Quote A has a 7.000% annual note rate and no discount points. Quote B has a 6.625% rate and one point, or $2,400. These rates and fees are illustrative inputs, not current offers or an estimate of what any borrower qualifies for.

All displayed dollar figures are rounded to whole dollars. Calculations below use unrounded payments, so multiplying the rounded $60 savings will differ slightly from the table totals. Taxes, insurance, HOA dues and other operating costs are assumed identical between these loan choices and are excluded from the payment comparison.

The formula is payment = principal × monthly_rate / (1 - (1 + monthly_rate)^(-months)). Divide the annual rate by 12 and express it as a decimal. A spreadsheet's payment function can independently reproduce the two payments. When using the single-family rental calculator, keep every property assumption identical and change only the loan rate and the additional closing cost.

Before doing the math, check whether the quoted charge actually purchases a rate reduction. An origination fee expressed in points can be a charge for making the loan rather than discount points. Ask for the zero-point alternative and the complete fee sheet. A lower rate with higher unrelated fees needs those extra costs included too.

Calculate the cash break-even month

Divide the incremental upfront cost by the monthly payment savings. Here that is $2,400 divided by the unrounded difference between the two payments: 40.01 months. After 40 payments, a small part of the fee is still unrecovered. After payment 41, cumulative payment savings exceed the $2,400 charge.

The formula works only when the comparison isolates the actual extra cost. If Quote B also charges an additional $500 processing fee, use $2,900 rather than $2,400. If its lender credit offsets part of an otherwise identical cost, subtract that documented credit. Do not include the down payment as a fee that must be recovered; it becomes property equity.

A lender credit and a seller credit come from different parties. A lender credit may trade a higher interest rate for less cash due at closing. A seller credit is negotiated in the purchase transaction and is subject to the lender's permitted uses and limits. Neither is automatically cash you can take home. Confirm how the credit appears in the final financing structure.

Where a Loan Estimate applies, the CFPB's form explainer helps locate loan charges, credits and cash-to-close figures. Some business-purpose investment loans use different disclosures. Request a comparable written breakdown rather than assuming every investor loan must use the same consumer form.

Keep the loan category consistent too. The DSCR-versus-conventional comparison explains why different qualification structures can produce different pricing and terms. A low-rate conventional quote and a business-purpose quote with different prepayment terms are not a clean points-only comparison.

Compare two-year, five-year and seven-year exits

Your property holding period and your loan holding period are separate. You could own the rental for ten years but refinance this loan in year two. Points are evaluated against the loan that carries the discounted rate, not every year you expect to own the building.

At two years, the payment savings have not recovered the fee. Quote B also leaves a $366 smaller loan balance, which partly offsets the cash shortfall when the loan is paid off. After including that difference, B still trails by $595. At five years, the payment savings exceed the fee by $1,199 and the lower payoff adds another $929, for a $2,128 advantage.

These figures assume payments on schedule, no extra principal, no prepayment penalty, identical other charges and a payoff immediately after the listed payment. They exclude taxes and the value of keeping cash available. That makes them a transparent comparison of these two hypothetical loans, not a full after-tax investment return.

If an investor loan has a prepayment penalty, add the contractual amount to the applicable exit scenario. A projected refinance rate should also remain an assumption until a lender supplies an executable offer. The cash-out refinance analysis addresses the broader question of whether replacing a loan improves the property decision.

Include the cost of tying up cash

As a sensitivity test, discount each month's payment savings at an illustrative 4% annual rate divided by 12. Over 60 months, their present value less the $2,400 fee is $857. That compares with $1,199 of undiscounted payment savings less the fee. The $857 calculation covers the payment stream only; the different payoff balance remains a separate benefit to discount and add if the loan ends then.

The discount rate is a decision input, not a guaranteed return on cash held elsewhere. An owner with a thin reserve balance may value immediate liquidity more than either calculation shows. Paying a fee to save $60 a month is difficult to defend if the same payment leaves no cash for a known repair next month.

Temporary buydowns change the first payments

Check eligibility before pricing a temporary buydown. Fannie Mae's temporary buydown rules list investment properties as ineligible. For eligible transactions, qualification uses the note rate. The subsidy illustration below explains the payment mechanics; it is not an available Fannie Mae investment-property offer. Another program needs its own written eligibility confirmation. Permanent discount points and a temporary subsidy are separate decisions.

A permanent rate buydown changes the note-rate comparison for the loan. A temporary buydown typically uses a funded subsidy account to reduce the borrower's early payment burden under specified terms. It does not mean the property's long-run mortgage cost falls to the introductory amount. Availability, who may fund it, qualification treatment and unused-fund handling depend on the actual loan program and contract.

For an arithmetic illustration only, apply a two-year subsidy to Quote A's $240,000, 30-year loan. Its note rate stays 7%. Suppose the subsidy makes the borrower's first-year payment equivalent to a payment calculated at 5%, and the second-year payment equivalent to 6%. From the third year, the borrower pays the full scheduled amount.

The sum of the first 24 monthly payment gaps is $5,594 using unrounded amounts. Someone must fund that subsidy. If an offer shifts $5,594 from another credit into the subsidy account, the lower first-year payment has not created $5,594 of free value. Compare both uses of that credit and obtain the lender's exact terms.

Underwrite the rental at the full ongoing payment. If it works only during the subsidized period, identify a supported reason the income or expenses will change before the subsidy ends. The ARM-versus-fixed guide covers a different source of payment change; a temporary subsidy and an adjustable note rate should not be treated as the same product.

Points versus an additional down payment

You could instead add the same $2,400 to the down payment and borrow $237,600 at Quote A's 7% rate. Holding the rate and term constant, the payment becomes $1,581, about $16 below the original zero-point loan. That is less immediate monthly relief than the $60 reduction from Quote B.

The comparison does not establish that points are four times better. Extra down payment leaves the borrower with $2,400 more starting equity and a lower debt balance. Discount points are a financing cost exchanged for future savings. Compare the remaining balances at your intended exit as well as the payments. Do not rank the options on monthly cash relief alone.

Actual pricing may change when the extra down payment crosses a loan-to-value threshold. Mortgage insurance, rate adjustments or loan-program eligibility can change, invalidating the assumption of an unchanged 7% quote. Obtain a third written offer with the larger down payment rather than estimating those changes from memory. The investment-property down-payment guide explains why the financing structure needs its own check.

Make the decision using a small set of scenarios

How much can you pay for the quoted discount?

Turn the comparison around when negotiating. Over 36 payments, this rate reduction saves $2,159 in payments and leaves a $552 lower payoff balance. The combined undiscounted benefit rounds to $2,712 using unrounded amounts. That is the maximum incremental fee that breaks even at this specific exit before taxes, discounting and liquidity costs. Paying $2,400 leaves about $312 of modeled advantage; paying $2,900 leaves a $188 disadvantage.

At 60 payments the comparable fee ceiling is $4,528. This ceiling is a way to compare a written offer with your intended loan life, not an estimate of what the lender will charge. If your holding period is uncertain, test the shorter plausible loan life first. A large projected benefit in year seven cannot pay an unexpected refinancing fee in year two.

Ask whether the discount changes the reserve balance you need after closing. If you have $8,000 available after the zero-point closing, paying $2,400 leaves $5,600. A known $6,000 repair would then require another $400 before any contingency. A positive five-year points result does not remove that immediate funding gap. Keep the repair and reserves in the same cash-to-close worksheet as the points.

Questions to resolve on the fee sheet

Record whether the points are refundable, whether a float-down or rate-lock extension changes the price, and whether the quote assumes a particular credit score, occupancy classification or loan-to-value band. Ask the lender to explain changes between the initial estimate and final documents. An answer in writing is easier to reconcile than a verbal promise that the lower payment will pay for itself.

The tax treatment of points is a separate calculation. IRS Publication 527 discusses rental-loan points and original issue discount. Do not assume the entire upfront fee is an immediate deduction or treat a possible deduction as cash available at closing. Have the financing charges classified before building an after-tax comparison.

Keep a comparison sheet with principal, note rate, amortization, discount cost, other incremental fees, credits, prepayment terms and expected loan exit. Add the zero-point offer even if the lender leads with the lowest advertised rate. Use the same quote date or lock conditions so a market move is not mistaken for a points discount.

Then test the shortest plausible loan life, your central case and a longer hold. For this example those are two, five and seven years. Include the payoff balances and record why each exit is plausible. If a sale or refinance is already planned before the cash break-even, the benefit of paying points needs a stronger case than an attractive monthly payment.

Check your remaining reserves after closing before choosing the offer. Reconcile the winning quote with the complete rental-property pro forma, including taxes, insurance, management, vacancy and replacements. A financing improvement cannot rescue an unsupported rent estimate or an omitted expense.

Run the two offers in the rental calculator, record the payment difference and calculate the break-even alongside it. The calculator does not promise a separate points break-even field. Save the scenarios to your account with clear names such as zero points and one point, then replace the illustrative terms with the final lender documents before relying on the result.