Questions people actually ask

Less than the folklore suggests. The 20% figure is not a requirement — it is the threshold above which you avoid mortgage insurance on a conventional loan. Plenty of buyers put down far less.

Conventional loans can go as low as 3% down for qualifying buyers, FHA loans start at 3.5% with qualifying credit, and VA and USDA loans can require nothing down for eligible borrowers. Each route has trade-offs, usually in the form of insurance premiums or eligibility limits.

The real question is not the minimum but the consequence: a smaller down payment means a larger loan, a larger monthly payment, mortgage insurance, and slower equity growth. Run both versions in the calculator and the difference is easy to see.

Lenders answer this with debt-to-income ratio: your total monthly debt payments divided by gross monthly income. Many look for that figure somewhere around 36% to 43%, though the limit varies by loan program and some allow more with compensating factors.

What a lender will approve and what you should borrow are different numbers. Approval math ignores retirement saving, childcare, irregular income, and the maintenance costs that come with owning rather than renting.

A useful sanity check: take the full monthly figure from the calculator, add a maintenance allowance, and ask whether you could still cover it in a month where something goes wrong.

For buyers, commonly somewhere in the range of 2% to 5% of the purchase price — but the spread across states is enormous, driven mostly by transfer taxes and whether an attorney is required.

These are cash due at closing, on top of your down payment, and they do not build equity. They are the most commonly forgotten line item in a first purchase.

The closing costs by state guide walks through why the same house can cost twice as much to close depending on where it sits.

The current market value of the home minus what you still owe on it. If the house would sell for $500,000 and your balance is $380,000, your equity is $120,000.

Two forces move it, on completely different timescales. Paying down principal is slow and certain. Appreciation is fast and uncertain — and when a home gains value, that entire gain lands in your equity without you paying for it.

Neither number is fixed. Value is an estimate until someone actually buys, and the balance falls on a schedule you can look up.

Four levers, in rough order of reliability: put more down, choose a shorter term, pay extra toward principal, or renovate in ways that add value.

Extra principal payments are the most flexible. Because interest is charged on the outstanding balance, a dollar sent to principal early removes every future dollar of interest that balance would have generated — the effect is much larger than it looks. Confirm with your servicer that extra payments are applied to principal rather than held as a prepayment.

Renovations are the least reliable. Most improvements return less than they cost, and the ones that come closest tend to be unglamorous — roofs, systems, and curb appeal rather than luxury finishes.

All three convert equity into cash, and all three put your home up as collateral. They differ in structure.

A home equity loan is a lump sum as a second mortgage, usually at a fixed rate with fixed payments. A HELOC is a revolving line you draw on as needed, usually at a variable rate, with a draw period followed by a repayment period. A cash-out refinance replaces your existing mortgage with a larger one and pays you the difference — which means giving up your current rate on the whole balance, not just the new money.

If your existing rate is well below current rates, a cash-out refinance is usually the expensive option, because it reprices everything.

A 15-year loan usually carries a lower rate and dramatically less total interest, because you are borrowing for half as long. The catch is a much higher monthly payment — not double, but a lot.

The 30-year buys flexibility. You can always pay a 30-year like a 15-year in good months and fall back to the smaller required payment when something breaks. You cannot do the reverse.

The full comparison covers the current rate gap and who each term genuinely fits.

A fixed rate never changes. An adjustable-rate mortgage holds an introductory rate for a set period, then adjusts periodically against an index, within caps that limit how far it can move at each adjustment and over the life of the loan.

ARMs typically start lower. That discount is compensation for taking on the risk that rates are higher when the adjustment arrives, so the question is whether you could absorb the highest payment the caps permit — not whether you expect rates to fall.

This calculator models a fixed rate held for the full term, with no refinancing.

When the interest you save outweighs what it costs to refinance, over the time you will actually keep the loan. The break-even is closing costs divided by monthly savings.

One thing people miss: refinancing into a new 30-year term restarts the amortization clock. Even at a lower rate, you land back at the front of the schedule where payments are mostly interest, which can raise your lifetime interest cost while lowering the monthly payment.

Refinancing to a shorter term, or making extra principal payments afterward, avoids that trap.

Private mortgage insurance protects the lender, not you, if you stop paying. On conventional loans it is generally required when you put down less than 20%.

Annual cost typically runs from a fraction of a percent to over 1% of the loan amount, driven mainly by your credit score and loan-to-value ratio, and it is usually collected monthly as part of your payment.

It is a real cost with no return to you, which is why the gap between 15% and 20% down is often worth closing if you can.

Under federal rules, for most single-family primary residences your servicer must automatically cancel PMI once the balance is scheduled to reach 78% of the home’s original value, provided you are current on payments. You can request cancellation earlier, at 80%, subject to payment history and sometimes a new appraisal.

The word "original" is the catch. Automatic termination keys off the value at purchase, so appreciation alone will not trigger it. If your home has gained value and you believe you are under the threshold on current value, you generally have to ask and pay for an appraisal to prove it.

Servicer requirements vary, so ask yours what evidence it wants before spending money on an appraisal.

FHA loans carry a mortgage insurance premium rather than PMI, and it comes in two parts: an upfront premium charged at closing, commonly rolled into the loan, plus an annual premium paid monthly.

The important difference is duration. With less than 10% down, the annual premium generally lasts the life of the loan — it does not fall away as you build equity. With 10% or more down, it typically drops off after 11 years.

For borrowers who put down a little and then build equity, refinancing into a conventional loan is usually the only way out. That trade-off is worth modeling before choosing FHA.

Most lenders collect roughly one twelfth of your estimated annual property tax and homeowner’s insurance with each payment, hold it in an escrow account, and pay those bills when they come due.

Your interest rate is fixed; your taxes and insurance premiums are not. Servicers run an escrow analysis annually, and if the bills came in higher than projected, your monthly payment rises to cover both the shortfall and the higher going-forward estimate. This is the most common reason a "fixed" payment goes up.

It cuts both ways. If the account is overfunded you may get a refund and a lower payment.

Broadly: an assessed value set by your local assessor, multiplied by a rate set by the taxing authorities, less any exemptions you qualify for.

Every part of that varies. Assessment practices differ, rates are set locally rather than nationally, and exemptions — homestead, senior, veteran, and others — can change the bill substantially.

Effective rates across the country range from well under 1% of value to well over 2%, which is why two identical homes in different states can have very different monthly costs. The rate in this calculator is an area estimate; your assessor has the real one.

Several, deliberately, to keep the model readable: closing costs, mortgage insurance, maintenance and repairs, and the agent commissions and transfer taxes that come out of equity when you sell.

Maintenance is the big one for planning. It is a persistent annual expense that builds no equity at all, and it is the difference most often underestimated by people moving from renting to owning.

Add those back and the equity you could actually realize is lower than the projected figure. The Disclaimer documents every assumption in full.