How Much House Can You Afford With a 8% 30-Year Mortgage? To Spend This Amount on a House... You Need At Least This Monthly Income... To Cover This Monthly Housing Expense... Other Monthly Debt Payments Should Not Exceed... And You Need at Least This Much Cash... For the Down Payment Lenders Are Likely to Require... And the Closing Costs $400,000 $12,330 $3,449 $990 $54,400 $40,000 $14,400 350,000 10,790 3,019 860 47,600 35,000 12,600 300,000 9,250 2,588 740 40,800 30,000 10,800 250,000 7,710 2,076 700 34,000 25,000 9,000 200,000 6,760 1,893 550 17,600 10,000 7,600 150,000 5,020 1,405 400 13,200 7,500 5,700 100,000 3,280 918 240 6,880 3,000 3,880

Meeting Income Requirements

Lenders ask two basic questions about the borrower's ability to pay. First, is the borrower's income large enough to service the new expenses associated with the loan, plus any existing debt obligations that will continue in the future? Second, does the borrower have enough cash to meet the up-front cash requirements of the transaction? The lender must be satisfied on both counts.

Expense Ratios: In general, the lender assesses the adequacy of the borrower's income in terms of two ratios that have become standard in the trade. The first is called the "housing expense ratio" and is the sum of the monthly mortgage payment including mortgage insurance, property taxes and hazard insurance divided by the borrower's monthly income. The second is called the "total expense ratio" and it is the same except that the numerator includes the borrower's existing debt service obligations. For each of their loan programs, lenders set maximums for these ratios, such as, e.g., 28% and 36%, which the actual ratios must not exceed.

Variations in the Ratios: Maximum expense ratios actually vary somewhat from one loan program to another. Hence, if you are only marginally over the limit, nothing more may be required than to find another program with higher maximum ratios. This is a situation where it is handy to be dealing with a mortgage broker who has access to loan programs of many lenders.

But even within one program, maximum expense ratios may vary with other characteristics of the transaction, and this can work against you. For example, the maximum ratios are often lower (more restrictive) for any of a long list of program "modifications", such as, e.g., the property is 2-4 family, co-op, condominium, second home, manufactured, designed for investment rather than owner occupancy, the borrower is self-employed, the loan is a cash-out refinance, and combinations of any of these.

Borrowers' Ability to Raise the Maximum Ratios: The maximum ratios are not carved in stone if the borrower can make a persuasive case for raising them. The following are illustrative of circumstances where the limits may be waived.

• The borrower is just marginally over the housing expense ratio but well below the total expense ratio - 29% and 30%, for example, when the maximums are 28% and 36%.
• The borrower has an impeccable credit record.
• The borrower is a first-time home buyer who has been paying rent equal to 40% of income for 3 years and has an unblemished payment record.
• The borrower is making a large down payment.

Reducing Your Expense Ratios by Reducing the Term: If expense ratios exceed the maximums, one possible option is to reduce the mortgage payment by extending the term. If the term is already 30 years, however, there is very little that can be done. Few lenders offer 40-year loans, and extending the loan to 40 years doesn't reduce the mortgage payment much anyway. This is illustrated below for a $100,000 loan at 7%.

Term Payment Payment Reduction 10 Years $1,161   15 899 $262 20 775 124 25 707 68 30 665 42 35 639 26 40 621 18

Using Excess Cash to Reduce Your Expense Ratios: If you have planned to make a down payment larger than the absolute minimum, you can use the cash that would otherwise have gone to the down payment to reduce your expense ratios by paying off debt, paying points to reduce the interest rate, or funding a temporary buydown.

The first two approaches will work only in a small percentage of cases, however. For example, paying an extra 2.625 points to reduce the rate from 7% to 6.375% will reduce your housing expense ratio by only about 1 percentage point.

This assumes, furthermore, that the reduced down payment does not push you into a higher mortgage insurance premium category, which would offset most of the benefit. For this to happen, the smaller down payment must bring the ratio of down payment to property value into a higher insurance premium category. These categories are 5 to 9.99%, 10 to 14.99% and 15 to 19.99%. For example, a reduction in down payment from 9% to 6% wouldn't raise the insurance premium, but a reduction from 11% to 8% would.

Using the extra cash to pay off debt will work only if a) you exceed the maximum total expense ratio but not the maximum housing expense ratio (your ratios are 27% and 38%, for example, when the maximums are 28% and 36%); and b) your existing debts have short terms and high rates. For example, if you increase your loan by 2.6% and use the increase to repay debt, and if the debt has an average rate of 15% and is being repaid over 5 years, you would reduce your total expense ratio by about 2 1/2 percentage points.

Much the most effective way to reduce both expense ratios is to use a temporary buydown, which some lenders allow on some programs. With a temporary buydown, cash is placed in an escrow account and used to supplement the borrower's payments in the early years of the loan. For example, on a 2-1 buydown, the mortgage payment in years one and two are calculated at rates 2% and 1%, respectively, below the rate on the loan. The borrower makes these lower payments in the early years, which are supplemented by withdrawals from the escrow account. The expense ratios are lower because the payment used is the "bought down" payment in the first month rather than the total payment received by the lender.

For example, assuming a market interest rate of 7% on a 30-year FRM, an increase in the loan amount of 2.5% will fund a 2-1 buydown, where the payment is calculated in year one at 5% and in year 2 at 6%. This would reduce the expense ratio in year one by about 4 1/2 percentage points.

It is relatively easy for lenders to overcharge for temporary buydowns, and some do so.

It is relatively easy for lenders to overcharge for temporary buydowns, and some do so. Read What Is a Temporary Buydown?

Getting Third Parties to Contribute: Borrowers sometimes can obtain the additional cash required to reduce their expense ratios from family members, friends, and employers, but the most frequent contributors in the US are home sellers including builders. If the borrower is willing to pay the seller's price but cannot qualify, the cost to the seller of paying the points or the buydown escrow the buyer needs to qualify may be less than the price reduction that would otherwise be needed to make the house saleable.

Income Is Not Necessarily Immutable: While borrowers can't change their current income, there may be circumstances where they can change the income that the lender uses to qualify them for the loan. Lenders count only income which can be expected to continue, and they therefore tend to disregard overtime, bonuses and the like. The burden of proof is on the applicant to demonstrate that these other sources of income can indeed be expected to continue. The best way to do this is to show that they have in fact persisted over a considerable period in the past.

Borrowers who intend to share their house with another party can also consider the feasibility of making that party a co-borrower. In such case, the income used in the qualification process would include that of the co-borrower. Of course, the co-borrower would be equally responsible for repaying the loan. This works best when the relationship between the borrower and the co-borrower is permanent.

Meeting Cash Requirements

More borrowers are limited in the amount they can spend on a house by the cash requirements than by the income requirements. Cash is needed for the down payment, and also for settlement costs including points, other fees charged by the lender, title insurance, escrows and a variety of other charges. Settlement costs vary from one part of the country to another, and to some degree from deal to deal.

Down payment requirements range from 30% to zero and below -- in some cases, lenders will lend more than the value of the property. The requirements depend on the type of program, loan amount, property characteristics, and the borrower's credit rating.

VA-guaranteed loans (available only to veterans) require no down payment on loans up to $203,000. FHA-insured loans also require no down payment, with loan limits that vary by area, topping out at $219,849 in the highest cost areas.

On conventional (non-VA non-FHA) prime loans, the lowest down payment requirement is generally 5% on loans up to $400,000. It notches up quickly after that and is generally 40% on a $1,000,000 loan. Some special affordability programs are available from Fannie Mae and Freddie Mac with 3% down on loans up to $275,000.

On subprime loans, which carry higher interest rates, some lenders will advance up to 125% of property value to borrowers with good credit ratings.

Down payment requirements will be higher whenever a transaction has characteristics that lenders view as risky. The million dollar loan has a high requirement, for example, because it is secured by an expensive house which may have unique features which appeal to a limited number of potential buyers, and is therefore subject to much greater price variability than a less expensive house. For similar reasons, lenders will usually require a larger down payment if the borrower has a poor credit record, is purchasing a house as an investment rather than for occupancy, wants to refinance for an amount significantly larger than the existing balance, and so on.

In general, lenders want borrowers to meet the down payment requirement with funds they have saved because this indicates that the borrower has the discipline to save, which bodes well for the repayment of the loan. For this reason, they may restrict the amount of the down payment that is provided by gifts from family and friends. (Borrowers looking to parents for a major chunk of the down payment should make sure the money is in their own account several months before they apply for a loan). Borrowed funds will raise their hackles even more, since they impose an additional repayment obligation on the borrower.

Jack Guttentag is Professor of Finance Emeritus at the Wharton School of the University of Pennsylvania. Visit the Mortgage Professor's web site for more answers to commonly asked questions.