Pressured by consumer protection regulators, the Federal Housing Administration is expected to end one of its most controversial practices: Charging borrowers interest on their home mortgages for weeks after they've paid off the entire principal balance.

Though FHA officials declined to discuss the matter, the agency will have to eliminate its long-standing policy of collecting a full month's worth of interest - hundreds of dollars extra in many cases - even when borrowers terminate their loans earlier. For instance, if you pay off your FHA loan on July 3 in order to buy a new house with a conventional mortgage, FHA currently will demand interest charges on your mortgage through July 31, collecting it out of the settlement proceeds.

But under the Consumer Financial Protection Bureau's "qualified mortgage" rules, charging interest after a principal balance payoff "is the functional equivalent of a prepayment penalty," according to the bureau.

The Dodd-Frank Wall Street Reform and Consumer Protection Act, which created the bureau, prohibits prepayment penalties on "qualified mortgages," that is, residential loans that incorporate key consumer safeguards and are underwritten to limit risks for lenders and borrowers alike.

Qualified mortgages are expected to become the gold standard for home loans in the coming years, and will offer the lowest rates and best terms available in the marketplace. The Dodd-Frank law designates the bureau as the federal government's drafter of rules spelling out what constitutes a qualified mortgage.

Among major players in the mortgage field, FHA is the only one that requires full-month interest payoffs. Fannie Mae, Freddie Mac and the Department of Veterans Affairs all stop collecting interest on the day of payoff.

For more than a decade, FHA's practice has drawn congressional and real estate trade-group criticism. The National Association of Realtors also has been a vocal critic, and has launched multiple efforts in recent years to persuade the agency to abandon its policy, all to no avail. The realty group estimated that during one year alone - 2003 - FHA collected $587 million in "excess interest fees." With today's lower interest rates, the sums involved most likely would be lower, although FHA's loan portfolio and market share have increased.

FHA's policy has had the side effect of encouraging many borrowers to seek to pay off their loans as close as possible to the final days in the month in order to avoid the hefty interest penalties.

However, when mortgage lenders, title companies and settlement firms are busy - as they've been lately - it's often not possible to schedule an end-of-the-month settlement, causing some refinancers and sellers to pay more at the closing than they expected. Those extra payouts, in turn, can be shocks to unwary sellers and refinancers who have modest incomes and resources, as many FHA borrowers do.

FHA is now drafting a formal regulatory proposal aimed at bringing the agency into full compliance. At the end of that process, FHA presumably will collect interest only through the date of actual payoff of a mortgage, rather than the full month.

The takeaway here: Until FHA changes its policy, try to schedule any early payoff or closing on a refinancing as late in the month as possible to avoid punitive interest charges.

Kenneth Harney's email address is