Definition of "Affordability"

Misti  Griffin real estate agent

Written by

Misti Griffinelite badge icon

Fortress Real Estate Associates LLC

The definition of affordability in real estate is simply a buyer’s capacity to afford a house. Affordability is usually expressed in terms of the maximum amount a buyer will be able to pay for a house, and subsequently be approved for a loan in order to pay this amount. In real estate, this is known as the maximum affordable sale price, and it can be empirically calculated with relative ease. 

To calculate the maximum affordable sales price, you’ll need to take into account three different metrics by which the maximum affordable sales price is calculated. These are the income rule, the debt rule and the cash rule. After calculating each of these numbers, affordability will be the lowest of the three. Let’s take a closer look at each of these rules in turn, and see exactly how they come into play in calculating the maximum affordable sales price. 

The Income Rule in Affordability

This rule states that a borrower's monthly housing expense (MHE), which is the sum of the mortgage payment, property taxes and homeowner insurance premium, cannot exceed a percentage of the borrower's income specified by the lender. Once you’ve calculated a buyer’s MHE, you have their maximum affordable sales price according to the income rule. 

The Debt Rule in Affordability

The debt rule says that the borrower's total housing expense (THE), which is the sum of the MHE plus monthly payments on existing debt, cannot exceed a percentage of the borrower's income specified by the lender. Once calculated, this number is often lower than the number that you might arrive at using the income rule, making it essential for calculating the maximum affordable sales price. 

The cash rule in Affordability

The required cash rule says that the borrower must have cash sufficient to meet the down payment requirement plus other settlement costs. When the cash rule sets the limit on the maximum sale price, the borrower is said to be cash constrained. This number can be raised by lowering the down payment.

image of a real estate dictionary page

Have a question or comment?

We're here to help.

*** Your email address will remain confidential.
 

 

Popular Mortgage Terms

A bundle of mortgage characteristics that lenders view as comprising a distinct category. The characteristics used include whether it is an FRM, ARM, or Balloon, the term, the initial ...

An upfront cash payment required by the lender as part of the charge for the loan, expressed as a percent of the loan amount; e.g., '3 points' means a charge equal to 3% of the loan ...

A mortgage on which the interest rate is adjustable based on an interest rate index, and the monthly payment adjusts based on a wage and salary index. Dual index mortgages are not written ...

A borrower with the best credit rating, deserving of the lowest prices that lenders offer. ...

A plan purporting to protect FHA homebuyers against property defects. ...

Compiling and maintaining the file of information about the transaction, including the credit report, appraisal, verification of employment and assets, and so on. Mortgage brokers usually ...

A fee that some lenders charge to accept an application. It may or may not cover other costs such as a property appraisal or credit report, and it may or may not be refundable if the lender ...

The portion of the monthly payment that is used to reduce the loan balance. ...

On an ARM, the assumption that the value of the index to which the interest rate is tied does not change from its initial level. ...

Popular Mortgage Questions