Mortgage Interest Deductions 101: What You Should Know (2024)

If you don’t enjoy doing your taxes, you’re not alone. (Sometimes, it even feels feel like hot pokers under the fingernails.) But taxes can be fun when you understand how to make the best of your personal financial situations.

Savvy investors must understand the power of taking all of the deductions you can—legally, of course. These tax deductions canloweryour tax liability.

Related: 5 Steps to Successful Real Estate Accounting for Investing Newbies

What is the home mortgage interest deduction?

First, let’s define what a tax deduction is. Tax deductions are expenses you incur through the year that the IRS allows you to subtract from your taxable income. This actually lowers the amount of money you have to pay in taxes.

For homeowners, there can be some big deductions that come along with owning a home, such as the mortgage interest you pay. Bonus!

The mortgage interest deduction was designed to promote homeownership by allowing property owners to take a significant deduction. This itemized deduction allows a homeowner to deduct the interest they pay on a loan against their taxable income. You can deduct interest for:

  • Primary mortgages
  • Secondary mortgages
  • Home equity lines of credit (HELOCs)
  • Home equity loans.

The mortgage interest deduction can also apply if you pay interest on a condo, cooperative, mobile home, boat, or RV used as a residence.

Rules on rentals

There is a catch: The loan must be secured by principal residences, a.k.a a main home or second home that you use through a deed of trust, mortgage, or land contract. Essentially, you can’t deduct interest on your third, fourth, or fifth home—or any property you rent out.

In order to claim this deduction, you must use the property for more than 14 days out of the yearormore than 10% of the number of days it’s rented out at fair market value. (Whichever number is larger is the number you’ll need to use.) If you don’t meet this test, you can’t deduct the interest via Schedule A.

Now, if you have rental properties with mortgages, you can deduct the full mortgage interest as a supplemental income “loss” on Schedule E of your 1040 tax form.

What qualifies as a home?

For IRS purposes, a home is a house, condo, cooperative, mobile home, boat, or recreational vehiclethat has sleeping, cooking, and toilet facilities. Believe me, I’m still trying to get my tear-drop camper to qualify, but my CPA won’t go for it because it lacks a toilet!

Who can take the mortgage interest deduction?

In many cases, a homeowner can deduct all of their mortgage interest paid as long as they meet all of the requirements:

  • Date of the mortgage
  • Amount of the mortgage
  • How the proceeds are used

More on the rules and limits in a minute.

Mortgage Interest Deductions 101: What You Should Know (1)

Mortgage Interest Deductions 101: What You Should Know (2)

How can you take the deduction?

This is where the rubber meets the road. Home mortgage interest is reported on Schedule A of your 1040 tax form. Quite often, this single line-item deduction is what can help you exceed the standard deduction limit and allow you to pick up other Schedule A deductions.

If you have rentals with mortgages on them you can also deduct mortgage interest as well. You will just deduct this mortgage interest for your rentals on Schedule E (NOT Schedule A).

Related: How to Make $100k a Year with Fixer-Upper Rentals

What are the rules and limitations?

Prior to the 2017 Tax Cuts and Jobs Act, the maximum amount of debt eligible for the deduction was $1 million, and you could generally deduct interest on home equity debt of up to $100,000 ($50,000 if you’re married and file separately) regardless of how you used the loan proceeds.

Beginning in 2018, the limits changed and now the maximum amount of mortgage debt is limited to $750,000 if you are married filing jointly ($375,000 if you are married and file separately). Additionally, the loan must be used for building, purchasing, or improving your residence and it can be a primary mortgage, secondary mortgage, line of credit, or a home equity loan. In short: If you refinance or take out a home equity loan, no going out and purchasing a PS5 with that money.

However, if your mortgage existed before December 14, 2017, the IRS considers it grandfathered debt. You will receive the same tax treatment as under the old rules.

This is where it can be really helpful to bring in your accountant and make sure you meet the IRS rule that will allow you to take this deduction.

Mortgage interest deduction and refinancing

As stated before, you can deduct mortgage interest after a refinance, but the math starts getting tricky. Here’s a great statement from TurboTax on how refinances are treated.

“When you refinance a mortgage that was treated as acquisition debt, the balance of the new mortgage is also treated as acquisition debt up to the balance of the old mortgage. The excess over the old mortgage balance not used to buy, build, or substantially improve your home might qualify as home equity debt.

For tax years prior to 2018, interest on up to $100,000 of that excess debt may be deductible under the rules for home equity debt. Also, you can deduct the points you pay to get the new loan over the life of the loan, assuming all of the new loan balance qualifies as acquisition.”

If your head is swimming, don’t worry. So was mine when I first read it.

It’s that last statement you really need to pay attention to when refinancing. Essentially, you may be able to deduct the interest of up to $100,000 of the debt as well as 1/30th of the points each year, assuming it’s a 30-year mortgage.

When you sell or refinance again, you can then deduct all of the discount points not yet deducted—unless you refi with the same lender. In this case, you would add the points on the current loan to the old loan and deduct the points on a prorated basis over the life of the new loan.

If your head is still swimming (and don’t feel bad), work with an accountant to make sure you get this straight.

Related: 13 Books to Take Beginners From Zero to Real Estate Investing Hero

What records do you need to take the mortgage interest tax deduction?

With any tax-related item, you want to keep great records to support your claims. Like Rich Dad Advisor Tom Wheelright always says, “If you want to change your tax, you have to change your facts.”

When taking this deduction, it’s no different. Make sure to keep the following records on hand to document you are entitled to this deduction:

  • Copies of all Form 1098: Mortgage Interest Statementsthat your lender sends you to document how much mortgage interest you have paid throughout the year. You also want to document any deductible points and mortgage insurance premiums you paid as well.
  • Copies of all HUD closing statements from a purchase or refinance that show points that you paid (if any).
  • Information about the person who sold you the propertyif you purchased your home directly or used seller financing. This includes their name, address, and social security number. If you pay interest (and points) to them, you will want to document that as well.
  • Your federal tax returns from 2018 and afterso you can track the eligible interest and points you are deducting over the life of the mortgage.

Since you may be deducting mortgage points over the course of 30 years, keep these files on hand for the entire time you have the property.

When shouldn’t you deduct mortgage interest?

Now that you know about the mortgage tax deduction, its rules and limits, how to take it, and what supporting documentation it requires, is there a reason you wouldn’t want to take the deduction?

Maybe.

You see, the 2017 Tax Cuts and Jobs Act nearly doubled the standard deductions for taxpayers, making it unnecessary for many taxpayers to itemize their deductions on Schedule A. In 2020, the standard deduction for an individual is $12,400 on federal income taxes. For a couple married filing jointly, it’s $24,800.

Essentially, for a married couple, they would have to have a combined qualifying deductions of at least $24,800 to make it worth their while to forgo their standard deduction and itemize on Schedule A. Therefore, you wouldn’t want to take the deduction, as you would have a larger tax savings by just using your standard deduction.

However, if you can combine your qualifying mortgage interest deduction with other Schedule A deductions, you could exceed the standard deduction limit and potentially get larger tax savings. These deductions include:

  • State and local taxes
  • Medical and dental expenses
  • Charitable donations
  • Casualty and theft losses
  • All other itemized deductions limited to 2% of AGI
  • Foreign real estate taxes

Tax rules and limits change frequently. A qualified accountant is worth their weight in gold.

Note By BiggerPockets: These are opinions written by the author and do not necessarily represent the opinions of BiggerPockets.

Mortgage Interest Deductions 101: What You Should Know (2024)

FAQs

What are the rules for deducting mortgage interest? ›

You can deduct the mortgage interest you paid during the tax year on the first $750,000 of your mortgage debt for your primary home or a second home. If you are married filing separately, the limit drops to $375,000.

How do I calculate how much of my mortgage interest is deductible? ›

Divide the maximum debt limit by your remaining mortgage balance, then multiply that result by the interest paid to figure out your deduction. Let's consider an example: Your mortgage is $1 million. Since the deduction limit is $750,000, you'll divide $750,000 by $1 million to get 0.75.

How much money do you get back on taxes for mortgage interest? ›

You can deduct the interest you paid on the first $750,000 of your mortgage during the relevant tax year. For married couples filing separately, that limit is $375,000, according to the Internal Revenue Service.

Why didn't my mortgage interest lower my taxes? ›

The interest you pay on a mortgage on a home other than your main or second home may be deductible if the proceeds of the loan were used for business, investment, or other deductible purposes. Otherwise, it is considered personal interest and isn't deductible.

Is the mortgage interest 100% tax-deductible? ›

In a nutshell — yes. But let's be clear. We're talking about the interest portion of your mortgage payment that you make each month. The deduction doesn't apply to the mortgage principal, nor the down payment or mortgage insurance premiums (after tax year 2021).

Can I deduct mortgage interest if I am not on the loan? ›

Generally, the debt must be the taxpayer's, not someone else's. Treas. Reg. § 1.163-1(b) permits a deduction for interest paid on a mortgage when a taxpayer is the legal or equitable owner of the property, even though the taxpayer is not directly liable for the mortgage.

Is homeowners insurance tax-deductible? ›

Unfortunately, homeowners insurance premiums aren't tax deductible, unless the property creates a source of income.

Do you get a big tax return after buying a house? ›

As a newly minted homeowner, you may be wondering if there's a tax deduction for buying a house. Unfortunately, most of the expenses you paid when buying your home are not deductible in the year of purchase. The only tax deductions on a home purchase you may qualify for is the prepaid mortgage interest (points).

How does mortgage interest work? ›

Mortgage interest is calculated as a percentage of the remaining principal. When you first start making mortgage payments, you will likely pay more each month in interest than you do on the loan's principal. But, as you make payments, the principal you haven't repaid decreases.

Should I pay off my mortgage if I have the money? ›

Ultimately, the decision comes down to personal preference and whether the benefits outweigh the costs. Consider any prepayment penalty and the potential tax consequences. Also, conduct an inventory of your finances to determine if it's more sensible to use the funds elsewhere, like to eliminate high-interest debt.

Who claims mortgage interest when married filing separately? ›

When claiming married filing separately, mortgage interest would be claimed by the person who made the payment. Therefore, if one of you paid alone from your own account, that person can claim all of the mortgage interest and property taxes.

Why doesn t my mortgage interest give me more tax refund? ›

Why is my Mortgage Interest not affecting my refund amount? One important factor to remember is that you must be able to itemize your deductions to take advantage of claiming the interest on your return.

Do deductions increase refund? ›

Another beneficial way to boost your refund is through tax deductions. Tax deductions lower your taxable income, which in turn can lower your tax bill.

Is mortgage interest the only item you can deduct from income taxes as a homeowner? ›

You can deduct mortgage interest, property taxes and other expenses up to specific limits if you itemize deductions on your tax return.

What is the limit on interest expense deduction? ›

Adjusted Taxable Income. A taxpayer's deduction of business interest expenses paid or incurred is generally limited to 30 percent of the taxpayer's adjusted taxable income (ATI), but not less than zero.

What interest payments are tax deductible? ›

Tax-deductible interest payments

According to the IRS, only a few categories of interest payments are tax-deductible: Interest on home loans (including mortgages and home equity loans) Interest on outstanding student loans. Interest on money borrowed to purchase investment property.

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