Refinance calculator: break-even, cash-out and debt consolidation

Rate-and-term: the break-even is the whole question

A rate-and-term refinance changes the rate, the term, or both, and leaves the balance essentially where it is. The only honest test is the break-even: total costs divided by the monthly saving, against how long you actually intend to keep the loan.

Hypothetical worked example (illustrative rates, not current pricing). A $320,000 balance at 7.5% with 27 years left runs about $2,268 a month in principal and interest. Refinanced at 6.25% over 30 years with $6,000 of costs rolled in, the payment falls to roughly $2,007 — a $261 saving that recovers the costs in about 23 months. If you plan to be in the home five more years, that is straightforwardly good. If you are relocating next spring, it is not.

The second-order effect matters too. That same refinance adds three years to the payoff. Over the full term the lower rate still wins on total interest in this example, but the margin narrows sharply, and a 20-year term at the same rate would capture most of the saving without giving the years back.

• Costs recovered before you sell or refinance again — the primary test.
• Removing FHA mortgage insurance by moving to conventional at sufficient equity — often worth more than the rate itself.
• Leaving an adjustable rate before it adjusts — a risk decision, not only a payment decision.
• Shortening the term — raises the payment, cuts lifetime interest substantially.

Cash-out: what the equity actually costs

A cash-out refinance replaces the whole mortgage with a larger one. On a $500,000 home with a $320,000 balance, taking $50,000 out puts the new loan at $370,000 plus costs — about 75% loan-to-value, inside the usual 80% conventional cap. The payment rises because the balance rose, and cash-out pricing typically carries an adjustment above rate-and-term.

The decisive variable is your existing rate. Replacing a 3.25% pandemic-era first mortgage to access equity at today's pricing repricing the entire balance is expensive in a way the monthly payment understates. Where the existing rate is at or above market, cash-out is often the cleanest single-payment route to the same money.

• Pro — one fixed payment, one rate, no variable exposure.
• Pro — owner-occupied pricing on borrowed funds, generally the lowest-cost consumer borrowing available.
• Con — the entire balance is repriced, not just the new money.
• Con — the cash is secured by your home, and the loan-to-value cap may not release as much as you need.

HELOC and second mortgage as the alternative

A home equity line of credit sits behind the existing first mortgage and lets you draw only what you use. When the first mortgage carries a below-market rate, a HELOC preserves it, and that preservation is frequently worth more than the higher rate on the smaller balance.

The trade is rate structure and discipline. Most HELOCs are variable, tied to an index, and many run interest-only during the draw period before converting to a fully amortising payment — a step-up that catches borrowers who budgeted around the draw-period payment. A fixed-rate closed-end second sits between the two options: fixed payment, first mortgage untouched, higher rate than the first.

Hypothetical worked comparison (illustrative rates, not current pricing). $50,000 of equity accessed through a cash-out on a $320,000 balance reprices $370,000. The same $50,000 through a second lien leaves the $320,000 alone. If the existing first is at 3.25% and a hypothetical market rate is 6.25%, the second lien is almost always cheaper in total cost even at a higher headline rate.

Debt consolidation: real relief, real trade-offs

Consolidation is arithmetically attractive and behaviourally risky, and both halves deserve equal weight. Hypothetically, rolling $35,000 of revolving debt at 21% — say $850 a month — into a mortgage at an illustrative 6.25% over 30 years replaces that $850 with roughly $215 of additional mortgage payment. That is over $600 a month of cash-flow relief, which for a household under pressure is meaningful and immediate.

The costs are structural. Paying that $35,000 down at $850 a month costs roughly $12,000 in interest and clears in about four years. Amortised over thirty years at the same illustrative 6.25% it costs roughly $42,000 in interest — a much lower rate over a much longer term. These figures are hypothetical assumptions, not current pricing. And the debt is no longer unsecured: it is attached to your home, so a payment problem becomes a housing problem.

The pattern that fails is well documented: the cards are cleared, the balances rebuild, and the household ends up with both the mortgage-borne balance and new revolving debt. Consolidation works when it is paired with closing or freezing the accounts and directing part of the freed cash flow to the new principal — paying the old $850 against the new loan clears the added balance in about four years anyway, at the lower rate.

• Pro — a large, immediate monthly cash-flow improvement at a far lower rate.
• Pro — one payment and one due date instead of several.
• Con — total interest can rise sharply because the term is much longer.
• Con — unsecured debt becomes debt secured by your home.
• Con — the closing costs of the refinance are added to the balance too.

Using equity to buy another property

Pulling a down payment for a rental out of a primary residence is a legitimate strategy and a concentrated bet. You are raising the fixed cost of the home you live in to acquire an asset whose income depends on tenants, and both sit on one household balance sheet.

Run it on stressed assumptions rather than optimistic ones: two months of vacancy a year, maintenance and capital reserves, management cost even if you self-manage, and insurance and property tax at the levels a non-owner-occupied property attracts. If the deal only works at full occupancy with no reserve, it does not work. Note too that investment-property financing carries its own pricing and reserve requirements, and that the added debt tightens your ratios for everything you do afterwards.

If you have down payment assistance in place

Assistance recorded as a second lien does not disappear because you refinance. The agency has to agree to subordinate its lien behind the new first mortgage, or the balance must be paid off at closing. Many agencies subordinate for a rate-and-term refinance and decline for a cash-out, on the reasonable view that the program funded a home purchase, not equity extraction.

Forgivable seconds add a second question: does a refinance stop the forgiveness clock? Some programs say yes and accelerate the unforgiven balance; others continue as long as you occupy the home. Use the repayment calculator to see the unforgiven balance at your current year, then get the agency's answer in writing before spending money on the refinance.