A design demonstration. Ropewalk is not a real lender.

(401) 555-0137
RopewalkMortgage Co.

How much house can I carry?

Affordability calculator

Most affordability calculators give you a number. This one also tells you which constraint produced it, because that is the thing you can do something about.

A ratio test is not an approval. Credit score, reserves, employment history, property type and automated underwriting all sit behind the number and none of them are modelled here.

Your inputs

Before tax, and the figure a lender would count — not what lands in your account.

Car loans, student loans, minimum card payments, child support. Not utilities or groceries.

The conservative convention. Automated underwriting often allows more.

As a share of value, so it scales with the price the calculator lands on.

Leave at zero to ignore it. Conforming and FHA limits are set per county and change every year — look yours up rather than trusting a number typed into a website.

Your result

Price you could carry

$428,741

$368,741 borrowed, $60,000 down

What is actually limiting you

Your housing-payment ratio is the limit

Housing ratio allows$3,080
Total debt ratio allows$3,510
Housing budget used$3,080

The payment at that price

Principal & interest$2,330.69
Property tax$446.61
Hazard insurance$142.91
Mortgage insurance$159.79
Association dues$0.00
Total$3,080.00

Private mortgage insurance (PMI)

Borrower-paid PMI ends automatically when the scheduled balance reaches 78% of the original value (Homeowners Protection Act of 1998); it can be requested at 80%. The rate shown is an illustrative mid-range premium — real pricing depends on credit score, loan-to-value, occupancy and coverage.

What the payment is made of
Sensitivity to the rate

Two percentage points either side of your figure. This is why a rate lock matters more than a haggle over the price.

Sensitivity to the down payment

The line steepens once mortgage insurance drops away.

Take this with you

Every number you entered is in the address bar. Copy the link and it opens with your inputs restored — that is how everything else here shares.

Nothing is sent from this site. This is a demonstration: when you press the button it builds a message you can send yourself from your own mail app, which is the only honest version of this feature here.

What this assumes

  • The price is solved in closed form: housing cost is linear in price, so the equation is rearranged and evaluated once rather than searched for.
  • Both ratio caps are applied and the tighter one wins — that is the constraint named above.
  • Property tax and hazard insurance scale with the price the solve lands on.
  • Mortgage insurance follows the programme's rule, and a conventional borrower who lands at or under 80% loan-to-value is not charged any.
  • No reserves test, no residual-income test (which VA does apply), no credit overlay.

Demonstration form

Have someone look at it

If this were a working site, this is where the conversation would start.

Only used to call you back — and on this demonstration, not even that.

This form does not send anything. It validates what you type, shows you a confirmation, and stops there. Nothing is stored, nothing is transmitted, and nobody will call you. There is no consent box here because there is nothing to consent to.