Renovation loan payment calculator

Estimate the monthly payment and total interest on a loan used to fund your renovation — then check how much of the project you recoup at resale.

Return on Reno is not a lender, bank, or broker and does not offer credit. This is a planning estimate only — not a loan offer, quote, or financial advice. Real rates, fees, and terms vary by lender and your circumstances; consult a qualified financial professional before borrowing.

What this tells you

Enter the loan amount, interest rate (APR), and term, and the calculator works out the fixed monthly payment for a standard amortising loan, plus the total you'll repay and how much of that is interest. Each payment is split between interest on the outstanding balance and a chunk of principal; because the balance shrinks over time, later payments chip away at the principal faster than early ones do.

How term and rate change the cost

The two biggest levers are the term and the rate. A longer term lowers the monthly payment but raises the total interest, because you owe the balance for longer. A higher rate raises both. The table below shows the same $30,000 renovation loan at 8% APR across different terms:

Illustrative figures for a $30,000 loan at 8% APR, principal and interest only. Stretching from 5 to 10 years cuts the payment by ~40% but more than doubles the interest.

A worked example

Suppose you borrow $30,000 for a kitchen refresh at 8% APR over 5 years. The monthly payment is about $608, you repay roughly $36,500 in total, and about $6,500 of that is interest. If the same refresh adds $25,000 of resale value, the borrowing cost is modest against the return — but a project that recoups far less would need a harder look before you take on the loan.

Types of renovation financing compared

The calculator above works for any fixed-rate amortising loan, but the kind of loan you choose determines the rate, the terms, and the risk. Here is how the main options compare in practice.

Home equity loan

A lump sum at a fixed rate, repaid over a set term — essentially a second mortgage. Rates in 2026 typically run 7–9% for borrowers with good credit. Terms range from 5 to 20 years. The advantage is predictability: every payment is the same, and you know exactly what you'll owe at the end. The drawback is that your home secures the loan — default and you risk foreclosure. Best for a single project with a well-defined budget where you want the certainty of fixed payments.

HELOC (home equity line of credit)

A revolving credit line, usually at a variable rate, that you draw against as needed. You only pay interest on the amount you've drawn, not the full limit. Rates are often lower initially (6–8% in 2026) but can rise with the prime rate. The draw period is typically 10 years, followed by a repayment period of 10–20 years. HELOCs work well for phased renovations or projects where the final cost isn't certain — you borrow $15,000 now for the kitchen, then another $8,000 next year for the bathroom, paying interest only on what you've used. The risk is rate volatility: if rates jump 2–3 points, your payment jumps with them.

Cash-out refinance

You replace your existing mortgage with a larger one and receive the difference in cash. This makes sense when current mortgage rates are at or below your existing rate, because you consolidate everything into one payment at a lower (or similar) rate. If rates have risen since you took your mortgage, a cash-out refi resets your entire balance to the higher rate — potentially costing far more in total interest than a smaller home-equity loan at the same rate. Run the numbers carefully before choosing this path.

Personal loan (unsecured)

No home as collateral — the lender relies on your credit and income. That means higher rates (typically 8–15% in 2026) and shorter terms (3–7 years). Monthly payments are higher, but your home isn't at risk. Personal loans make sense for smaller projects ($5,000–25,000) where the interest premium is manageable, or when you don't have enough equity for a secured product. Approval is usually faster — days rather than weeks.

Contractor financing

Some contractors offer in-house financing or partner with lenders to offer promotional rates — "12 months same as cash" or "3.9% for 60 months." These can be genuine deals, but read the terms carefully. Deferred-interest promotions charge you all the accumulated interest if you don't pay in full before the promotional period ends. And the convenience of bundling financing with the contractor can reduce your leverage to negotiate on price or hold the contractor accountable for quality.

Credit cards

At 20–28% APR, credit cards are the most expensive way to finance a renovation and should be a last resort for significant projects. A $15,000 balance at 24% with minimum payments would take over a decade to clear and cost more in interest than the original project. The one exception is a 0% introductory-rate card for a small project you can pay off entirely within the promotional window (usually 12–18 months). Even then, have a firm payoff plan.

How to decide how much to borrow

The amount you can borrow and the amount you should borrow are rarely the same number. Here is how to find the right one.

Borrow for the project, not the maximum

Lenders will often approve you for more than you need — that's their business model. Start with the actual project cost (quotes in hand), add 10–15% for contingency, and borrow that amount. If your contractor quotes $35,000 for a bathroom remodel, borrow $35,000 plus $4,000–5,000 contingency, not the $80,000 the lender offers. Extra borrowed money sitting in a checking account accrues interest from day one with no return.

Check that the monthly payment fits after the renovation

Your post-renovation expenses may be higher than today's: higher property taxes if the renovation triggers a reassessment, higher insurance premiums if you've increased the replacement cost, and the loan payment itself. Model all three into your monthly budget. If the combined housing cost exceeds 30–32% of gross income, you're in a zone where one income disruption can create real stress.

Consider whether the ROI justifies the interest cost

A $40,000 kitchen that recoups $28,000 at resale (70% ROI) means you're already losing $12,000 on the project. If you finance the $40,000 at 8% over 7 years, you'll pay roughly $12,400 in interest — bringing the total out-of-pocket cost to $52,400 against $28,000 of recouped value. That's a net cost of $24,400 for the upgrade. That may still be worthwhile for your daily life, but it's important to see the full picture before committing. Use the ROI calculator alongside this loan calculator to weigh the total cost against the total return.

The true cost of financing a renovation

The monthly payment is the number you live with, but the total interest is the number that tells you what the loan actually costs. Even small differences in rate or term compound into large sums over time.

How rate differences add up

Consider a $40,000 renovation loan over 7 years. At 6% APR, the monthly payment is about $585 and total interest over the life of the loan is roughly $9,100. At 8%, the payment rises to $624 and total interest climbs to $12,400. That 2-percentage-point difference costs you an extra $3,300 — almost enough for a second bathroom vanity. Shopping for the best rate isn't marginal; it's material. Three rate quotes from different lenders is a reasonable minimum.

The opportunity cost of interest

Every dollar paid in interest is a dollar not invested, not saved, and not spent on the renovation itself. The $12,400 in interest on that 8% loan could have funded an additional project — a whole-home paint job, for example, or a significant flooring upgrade. When you're deciding between borrowing and waiting to save, the interest cost is what you're paying for the privilege of doing the project now rather than later.

Shorter terms cost less overall

If you can afford the higher monthly payment, shorter terms save significant money. The same $40,000 at 8% costs about $9,300 in interest over 5 years versus $12,400 over 7 years and roughly $18,500 over 10 years. Going from 10 years to 5 years doubles the monthly payment (from roughly $485 to $811) but cuts total interest nearly in half. Use the calculator to find the shortest term whose monthly payment fits your budget comfortably.

Before you borrow

It's worth checking two things first: how much you could borrow against your home (the home-equity calculator), and whether the project earns its keep (the ROI calculator shows how much you recoup at resale). If you're still sizing the budget, the renovation budget calculator suggests a sensible range for your home's value.

Frequently asked questions

A standard amortising-loan estimate for planning, showing principal and interest only. Actual rates, fees, and terms vary by lender and credit. Not a loan offer or financial advice. Reviewed July 2026.