The first-time homebuyer tax credit has made it possible for many people to own a house.

The original first-time homebuyer tax credit provided buyers with a tax credit of up to $7,500. The tax break subsequently was expanded, with a new credit limit of $8,000 for first-time homebuyers and $6,500 for homeowners seeking to move into another residence.

But as with all things tax, in order to get the most of this tax benefit, homeowners must follow the Internal Revenue Service rules.

And a key homebuyer tax credit rule kicked in with 2010 tax filings. Folks who claimed the very first version of the tax break on their 2008 tax returns had to make their first repayment installment last year. The payback continues this filing season.

Paying Back the 2008 Tax Year Claim

The original first-time homebuyer tax credit was not a true credit. Rather, it essentially was an interest-free loan from Uncle Sam, and every loan has payback terms. In this case, the credit is to be repaid in 15 equal payments of $500 each tax-filing time, beginning with 2010 returns.

That first repayment last year was recorded on part four of Form 5405, and that amount is then transferred to line 67 of the "payments" section of Form 1040. You'll continue to repay the credit each filing season until it's paid off, but you might not have to file a Form 5405 for future payments.

If you bought the home in 2008 and owned and used it as your main residence for all of 2011, you can enter your 2011 repayment directly on line 59b of Form 1040 without attaching Form 5405.

Lump-Sum Payback Triggers

Nowadays, however, few people stay in the same house for 15 years, so the IRS devised a way to get the original homebuyer credit back from those folks.

When you quit using the home as your main residence, for example by selling or renting the property, then you have to pay the balance of the $7,500 credit in full when you file the tax return for the year in which your living arrangements changed.

There are some exceptions -- what the IRS calls disposition situations -- which could get you off the lump-sum repayment hook.

  • You transfer your home as part of a divorce settlement. Your former spouse then is responsible for making the rest of the repayments.
  • Your home is destroyed, condemned or disposed of under threat of condemnation. If you buy a replacement home within two years, you can continue to repay the credit in annual installments.
  • If you die, any remaining annual installments are not due. However, if the credit was claimed on a joint return, the surviving spouse pays only his or her half of the remaining credit amount.

And if you sell the house on which you claimed the $7,500 credit, your profit will determine how much you must pay back. When you sell, either by your choice or as part of a foreclosure, you only have to repay the credit up to the amount of the gain on the sale, if any.

Claiming Subsequent Homebuyer Tax Credits

Form 5405 is a multipurpose IRS document. In addition to recording payback of the original homebuyer credit, it is used to claim subsequent versions of the tax break.

When the American Recovery and Reinvestment Act, often referred to as the stimulus bill, became law in 2009, it included changes to the homebuyer tax credit.

  • The maximum first-time homebuyer tax credit amount was increased to $8,000 or 10% of a property's purchase price, whichever was less.
  • A second credit of up to $6,500 was created for current homeowners looking to buy another house.
  • The tax break was made a real credit, meaning that in most cases the money??would not have to be paid back.

This credit was available to qualifying taxpayers who closed on the purchase of their homes by the end of November 2009. But the still-struggling housing sector prompted Congress to extend this tax credit even further.

The Worker, Homeownership and Business Assistance Act of 2009 was signed into law Nov. 6, 2009, and gave credit-eligible homebuyers until June 30, 2010, to close on a property.

And some taxpayers still can claim the first-time homebuyer credit for 2011. You qualify if you (or your spouse if married) were a member of the uniformed services, U.S. foreign service or an employee of the intelligence community on qualified official extended duty outside the United States for at least 90 days between Jan. 1, 2009, and April 30, 2010. In these cases, a qualifying homebuyer can claim the credit for a home bought before May 1, 2011, or if they signed a written binding contract by that date and closed on the house by June 30, 2011.

Three-Year Residency Required

While there's no longer an automatic payback of the latest version of the homebuyer tax credit, you could still owe the IRS if you don't live in your home long enough.

To get the homebuyer tax credit outright, you must live in the house as your principal residence for three consecutive years after purchase.

If you move out within 36 months of purchase, you must pay back the full credit. The same exceptions as those that apply to the original first-time homebuyer credit could save you from the payback requirement.

But if you simply move, either because you, for example, sold the home on which you claimed the credit or converted it to rental or business use, you must give back the $8,000. You'll do so via your tax return filing for the tax year in which your residential circumstances changed, again using Form 5405. This time, fill out part three.

You also need to be aware the payback could cause other tax trouble.

"They now owe the $8,000 and also could face an estimated tax penalty," says John Sheeley, an enrolled agent with his own tax practice in Goshen, N.Y. "It's not something most people are thinking about. If you sell your house, that's a life-changing event. But something like this, that they might have this tax issue, doesn't occur to them."

And even when they are made aware of the tax costs, that's still not enough to prompt some homeowners to change their plans.

One of Sheeley's clients was a single man who bought a home in Brooklyn using the $8,000 tax credit. "Subsequently he meets the love of his life, who won't leave Manhattan," says Sheeley. "Now he plans to rent the place in Brooklyn to an unrelated third party, which triggers a recapture of the first-time homebuyer credit."

Sheeley explained the tax consequences to his client, but in this case love conquered the tax code.

He headed to the neighboring borough, says Sheeley, because his sweetheart wouldn't move to Brooklyn for $8,000.

Copyright 2012, Bankrate Inc.