Rent vs. Buy: The True Cost of a Mortgage

Not All Dollars Are Spent Equally

For many prospective homebuyers, a mortgage payment will significantly exceed the cost of renting—but that direct comparison can be misleading.  Rent is a fixed payment where every dollar spent is purely an expense.  A mortgage, on the other hand, is made up of four separate components: principal, interest, taxes, and insurance (PITI). 

When you break these pieces apart, it becomes clear that not every dollar spent on a mortgage is equal.  For example, unlike rent, a portion of each mortgage payment builds equity and can be viewed more like an investment than an expense.  In addition, homeowners may benefit from tax deductions that can further offset costs.

The result is that, when viewed through this lens, the “true” cost of owning a home can be much closer to renting than it initially appears.

Deconstructing the Mortgage (PITI)

• • Principal – Reduces the loan balance and builds equity. While it requires monthly cash outflow, it isn’t an expense in the traditional sense.  Instead, it represents a transfer from cash into home equity, increasing net worth by reducing the difference between what is owned and what is owed.
  • Interest – The cost of borrowing money and represents income to the lender rather than equity for the homeowner. However, mortgage interest is often tax-deductible (subject to certain limitations), which means a portion of interest paid can be offset by a reduction in taxable income.  For example, a household in the 24% tax bracket will effectively recover $0.24 of every $1.00 spent on mortgage interest through tax savings.
  • Taxes – While property taxes are a non-equity expense of homeownership, they too are often deductible under the state and local tax (SALT) rules. However, deduction limits may reduce or eliminate this benefit, particularly for high earners in high-tax states.
  • Insurance – The only component of PITI that generally provides no direct equity creation or tax advantage. This includes homeowners insurance as well as Private Mortgage Insurance (PMI), which is typically required for down payments under 20%.

The Standard Deduction Baseline

When filing your annual tax return, you have two basic deduction options.  You can either choose to take the standard deduction or itemize your deductions: 

• • The standard deduction is a lot like hitting the “easy button.” It is a fixed dollar amount set by the IRS that you subtract from your income, no questions asked. Statistically, most people choose the standard deduction because it is simple, fast, and there’s no need to track your deductible expenses.  The actual dollar amount depends on your filing status (single, married, etc.).  For simplicity, we’ll use the Married Filing Jointly tax status as the base case, which is $32,200 for the 2026 tax year.
  • When selecting an itemized deduction, instead of taking the flat amount, you list specific expenses you paid during the year and add them up. Some common itemized deductions include mortgage interest, state and local taxes (which typically include property taxes), charitable donations, certain medical expenses, and others.  People choose to take an itemized deduction when their total deductions add up to more than the standard deduction, giving them a larger tax break.

In today’s housing environment especially, it’s not uncommon for a new homeowner’s itemized deductions to total more than their standard deduction.  However, there’s a key nuance. 

Because most households already receive the standard deduction regardless of whether they rent or own, the tax benefit of homeownership is incremental.  In other words, mortgage interest and property tax deductions only provide value to the extent they exceed the standard deduction. If they don’t, the tax benefit is effectively negligible.

The “Net” Housing Payment

Let’s walk through a simple example:

• • Home Price = $750,000
  • Down Payment = $100,000
  • Interest Rate = 6.00%
  • Loan Term = 30 years
  • Property Tax = 1.00%
  • Annual Insurance = $2,000
  • Private Mortgage Insurance (PMI) = 0.50%

Using our Mortgage Payment Calculator, the estimated monthly payment comes out to $4,960.  Compared to an assumed current rent of $3,250, this would be at a 53% increase in housing costs.  But as we discussed earlier, not every dollar of a mortgage payment should be treated equally.

At the end of year one, the total cost of servicing the mortgage is approximately $59,500, broken out as:

• • Principal = $8,000
  • Mortgage Interest = $39,000
  • Property Taxes = $7,500
  • Insurance = $5,000

From a tax perspective, mortgage interest and property taxes total $46,500, which exceeds the standard deduction of $32,200.  As a result, itemizing makes sense in this scenario.  The incremental benefit of itemizing is $14,300 ($46,500 – $32,200 = $14,300), and assuming a 24% marginal tax rate, this produces an annual tax savings of $3,432, or about $286 per month.

As noted earlier, principal payments build equity and function more like an investment than an expense.  For that reason, the $667 per month allocated toward principal can be excluded when evaluating the net house payment.  Insurance, on the other hand, remains a pure expense and offers no offset.

After accounting for these factors, we’re able to “claw back” roughly $953 per month, bringing the effective monthly net housing cost down to $4,007 ($4,960 – $953 = $4,007).  Now, instead of a 53% increase versus renting, the gap narrows to a more modest 23% increase—nearly cutting the original difference in half.