What are the tax benefits of owning a home? Plenty of homeowners are asking themselves this right around now as they prepare to file their taxes. You may recall the new Tax Cuts and Jobs Act—the most substantial overhaul to the U.S. tax code in more than 30 years—went into effect on Jan. 1, 2018. And as a result, last year likely brought big changes to your taxes, especially the tax perks of homeownership.

While not much has changed taxwise since then, an entire year has passed—so you might need a refresher as you sit down with your receipts.

Well, look no further than this complete guide to all the tax benefits of owning a home, where we break down all the tax breaks homeowners should be aware of when they file their 2019 taxes in 2020. Read on to make sure you aren't missing anything that could save you money!

Tax break 1: Mortgage interest

Homeowners with a mortgage that went into effect before Dec. 15, 2017, can deduct interest on loans up to $1 million.

"However, for acquisition debt incurred after Dec. 15, 2017, homeowners can only deduct the interest on the first $750,000," says Lee Reams Sr., chief content officer of TaxBuzz.

Why it's important: The ability to deduct the interest on a mortgage continues to be a big benefit of owning a home. And the more recent your mortgage, the greater your tax savings.

"The way mortgage payments are amortized, the first payments are almost all interest," says Wendy Connick, owner of Connick Financial Solutions. (See how your loan amortizes and how much you're paying in interest with this online mortgage calculator.)

Note that the mortgage interest deduction is an itemized deduction. This means that for it to work in your favor, all of your itemized deductions (there are more below) need to be greater than the new standard deduction, which the Tax Cuts and Jobs Act nearly doubled to $24,400 for a married couple. For individuals the deduction is $12,200, and it's $18,350 for heads of household.

As a result, only about 5% of taxpayers will itemize deductions this filing season, says Connick.

For some homeowners, itemizing simply may not be worth it. So when would itemizing work in your favor? As one example, if you're a married couple who paid $20,000 in mortgage interest and $6,000 in state and local taxes, you would exceed the standard deduction and be able to reduce your taxable income by an additional $2,000 by itemizing.

Tax break 2: Property taxes

This deduction is capped at $10,000 for those married filing jointly no matter how high the taxes are. (Here's more info on how to calculate property taxes.)

Why it's important: Taxpayers can take one $10,000 deduction, says Brian Ashcraft, director of compliance at Liberty Tax Service.

Just note that this year, property taxes are on that itemized list of all of your deductions that must add up to more than the standard deduction ($24,000 for a married couple) to be worth your while.

And remember that if you have a mortgage, your property taxes are built into your monthly payment.

Tax break 3: Private mortgage insurance

If you put less than 20% down on your home, odds are you're paying private mortgage insurance, or PMI, which costs from 0.3% to 1.15% of your home loan. But here's some good news for PMI users: You can deduct the interest on this insurance thanks to the Mortgage Insurance Tax Deduction Act of 2019. Also known as the Secure Act, it retroactively reinstated for 2018 and 2019 certain deductions and credits for homeowners.

"These include the deduction for PMI," says Laura Fogel, certified public accountant at Gonzalez and Associates in Massachusetts. (This credit is retroactive for 2018, so talk to your accountant to see if it makes sense to amend your 2018 tax return.)

Why it's important: The PMI interest deduction is also an itemized deduction. But if you can take it, it might help push you over the $24,000 standard deduction. And here's how much you'll save: If you make $100,000 and put down 5% on a $200,000 house, you'll pay about $1,500 in annual PMI premiums and thus cut your taxable income by $1,500. Nice!

Tax break 4: Energy efficiency upgrades

The Residential Energy Efficient Property Credit was a tax incentive for installing alternative energy upgrades in a home. Most of these tax credits expired after December 2016; however, two credits are still around. The credits for solar electric and solar water heating equipment are available through Dec. 31, 2021, says Josh Zimmelman, owner of Westwood Tax & Consulting, a New York–based accounting firm.

The Secure Act also retroactively reinstated a $500 deduction for certain qualified energy-efficient upgrades "such as exterior windows, doors, and insulation," says Fogel.

Why it's important: You can still save a tidy sum on your solar energy. And—bonus!—this is a credit, so no worrying about itemizing here. However, the percentage of the credit varies based on the date of installation. For equipment installed between Jan. 1, 2017, and Dec. 31, 2019, 30% of the expenditures is eligible for the credit. That goes down to 26% for installation between Jan. 1 and Dec. 31, 2020, and then to 22% for installation between Jan. 1 and Dec. 31, 2021.

Tax break 5: A home office

Good news for all self-employed people whose home office is the main place they work: You can deduct $5 per square foot, up to 300 square feet, of office space, which amounts to a maximum deduction of $1,500.

Understand, however, that there are strict rules on what constitutes a dedicated, fully deductible home office space. Here's more on the much-misunderstood home office tax deduction.

The fine print: If you work from home occasionally but have an office to go to, you can't take this deduction.

Tax break 6: Home improvements to age in place

To get this break, these home improvements will need to exceed 7.5% of your adjusted gross income. So if you make $60,000, this deduction kicks in only on money spent over $4,500.

The cost of these improvements can result in a nice tax break for many older homeowners who plan to age in place and add renovations such as wheelchair ramps or grab bars in slippery bathrooms. Deductible improvements might also include widening doorways, lowering cabinets or electrical fixtures, and adding stair lifts.

The fine print: You’ll need a letter from your doctor to prove these changes were medically necessary.

Tax break 7: Interest on a home equity line of credit

If you have a home equity line of credit, or HELOC, the interest you pay on that loan is deductible only if that loan is used specifically to "buy, build, or improve a property," according to the IRS. So you'll save cash if your home's crying out for a kitchen overhaul or half-bath. But you can't use your home as a piggy bank to pay for college or throw a wedding.

The fine print: You can deduct only up to the $750,000 cap, and this is for the amount you pay in interest on your HELOC and mortgage combined. (And if you took out a HELOC before the new 2018 tax plan for anything besides improvements to your home, you cannot legally deduct the interest.)

For more smart financial news and advice, head over to MarketWatch.

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Source: "7 Tax Benefits of Owning a Home: A Complete Guide for Filing in 2020" REALTOR.com (February 3, 2020) Margaret Heidenry