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

The monthly index is a ratio of monthly interest costs to total funds, expressed as a percentage. Annualized interest, the numerator, is calculated by multiplying the deposit balances at ...

Interest from the day of closing to the first day of the following month. To simplify the task of loan administration, the accounting for all home loans begins as if the loan was closed ...

The lowest interest rate possible under an ARM contract. Floors are less common than ceilings. ...

Administering loans between the time of disbursement and the time the loan is fully paid off. Servicing includes collecting payments from the borrower, maintaining payment records, ...

Same as term Lead Generation Site: A mortgage Web site designed to provide leads to lenders. A 'lead' is a packet of information about a consumer in the market for a loan. Lenders pay ...

An agreement by the lender not to exercise the legal right to foreclose in exchange for an agreement by the borrower to a payment plan that will cure the borrowers delinquency. ...

A letter from a lender verifying that the price and other terms of a loan have been locked. Borrowers who lock through a mortgage broker should always demand to see the lock commitment ...

A non-citizen with a green card employed in the U.S. Non-permanent resident aliens are subject to somewhat more restrictive qualification requirements than U.S. citizens. Permanent ...

The amount of the original loan remaining to be paid. It is equal to the loan amount less the sum of all prior payments of principal. ...

Popular Mortgage Questions