Building Wealth Through Real Estate: The Four Pillars

A rental bought with a mortgage builds wealth four ways at once: cash flow (rent left after every cost), appreciation (the rise in the property's value), principal paydown (the rent reducing your loan balance), and tax savings from depreciation. In the example below, a $250,000 rental bought with $67,500 of your cash produces about $11,300 across the four pillars in year 1, but only about $2,150 of that reaches you as cash. The rest is equity, which becomes cash only when you sell or when you borrow against it with a cash-out refinance, which adds debt and closing costs. Over 30 years at 3% yearly appreciation, equity plus cash flow grows to about $950,000. At 1% appreciation it is about $396,000, which shows how much of the result depends on prices you do not control.

The example property

• Price $250,000, with 25% down ($62,500) and about $5,000 in closing costs: $67,500 of your cash.
• A $187,500, 30-year fixed loan at an assumed 7.75%: $1,343 a month in principal and interest. Freddie Mac's weekly average was 7.32% on October 22, 2026, but that survey covers owner-occupied purchase loans with 20% down, so a rental loan usually costs more.
• Rent $2,400 a month. Property taxes and insurance $400 a month.
• 23% of rent ($552) budgeted for vacancy (7%, close to the Census Bureau's 7.3% national rental vacancy rate for the second quarter of 2026), repairs and replacements (8%), and management (8%).
• Building value $200,000 and land $50,000.

Pillar 1: Cash flow

Rent of $2,400 minus the loan payment ($1,343), taxes and insurance ($400), and the 23% budget ($552) leaves $105 a month, or about $1,257 in year 1.

That is thin: at 7.75%, the loan payment alone takes 56% of the rent. Cash flow grows over time because the principal and interest payment on a fixed-rate loan never changes while rent can rise. If rent and costs each rise 3% a year, the property produces about $6,550 in year 10 and $14,350 in year 20. If rent rises only 1% a year while taxes and insurance rise 3%, cash flow stays near $1,900 a year in year 10. Our article on appreciation vs cash flow covers how to weigh the two when you choose a market.

Pillar 2: Appreciation

At 3% a year, the property gains $7,500 in value in year 1. Because you put in $67,500 and not $250,000, that gain equals 11% of your cash. That is financial leverage at work, and it runs in both directions: a 5% drop costs $12,500, or 19% of your cash. Our guide to real estate leverage strategy covers how down payment size changes this.

Use a modest assumption. In Aswath Damodaran's historical data at NYU Stern, the S&P/Case-Shiller national home price index rose about 4.2% a year on a compound basis from 1928 through 2025. That figure is price change only and ignores repairs and selling costs. More recently, FHFA's index rose 2.1% from the second quarter of 2025 to the second quarter of 2026, and prices fell in four states over that period. A local market can lag the national number for years. Part of appreciation also just keeps pace with rising prices in general, which our article on how inflation affects real estate investments explains.

Pillar 3: Principal paydown

Each payment splits between interest and principal. On the $187,500 loan, year 1 reduces the balance by about $1,646. The principal share rises every year:

Paydown only builds wealth while the rent covers the payment. In a month the unit sits empty, you make the payment from your own cash.

Pillar 4: Tax savings from depreciation

IRS Publication 527 has you depreciate residential rental buildings over 27.5 years starting when the property is placed in service. Land is not depreciable, so only the $200,000 building counts: $7,273 for a full year. Under the mid-month convention, a rental placed in service in January gets 11.5 months in year 1, or about $6,970.

In year 1, the rent collected minus deductible costs (taxes, insurance, repairs, management, and $14,474 of mortgage interest) leaves about $2,902 of taxable rental profit, assuming the 8% budget is spent on repairs. Replacements such as a new roof or furnace are depreciated over time instead of deducted in the year you pay for them. Depreciation turns that into a $4,068 loss on paper. What the loss is worth depends on your income:

• Modified adjusted gross income (MAGI) of $100,000 or less, and you actively participate (you approve tenants, set rent, and approve repairs): Publication 925 lets you deduct up to $25,000 of rental losses against your other income. In the 22% bracket, you owe no tax on the $2,902 rental profit (which would otherwise cost $638), and the $4,068 loss cuts the tax on your other income by about $895.
• Between $100,000 and $150,000: the $25,000 allowance shrinks by 50 cents for each dollar over $100,000.
• $150,000 or more: the loss is generally suspended and carried forward. You still owe no tax on the rental profit, and the suspended losses become deductible when you sell the property in a fully taxable sale.

Depreciation mostly defers tax. When you sell at a gain, the part of the gain that comes from the depreciation you took is taxed at up to 25% as unrecaptured section 1250 gain, according to the IRS. Our guide to depreciation on rental property covers how to figure your basis and file.

How the four pillars add up in year 1

The table counts only the $895 cut in tax on your other income, because the $1,257 of cash flow is a before-tax figure and depreciation means no tax is owed on it. Only the cash flow and that tax cut, about $2,152 together, reach your bank account in year 1. With MAGI of $150,000 or more, the tax line drops to $0 for now. If the value falls 5% instead, the year's total is about -$8,702.

How equity grows over 5 to 30 years

The table holds the same property with no new money added. The base case assumes 3% yearly appreciation and 3% yearly growth in rent and costs. The low case assumes 1% appreciation, 1% rent growth, and 3% growth in taxes and insurance. Cash flow is added up, not reinvested. Tax savings are left out, and so is income tax in later years, when rising rent and shrinking interest deductions can make the rental's profit taxable.

Selling costs come out of these numbers when you cash in. The Justice Department noted in December 2025 that U.S. broker commissions have stayed at 5% to 6% for decades. After a 6% commission on the year-10 base value, about $20,200, the base case nets roughly $190,000 before other seller closing costs and taxes on the sale, close to 2.8 times the $67,500 you put in. If the value never rises at all, equity plus cash flow at year 10 is about $92,000 before selling costs, and annual cash flow turns negative around then because taxes and insurance keep rising while rent does not.

Two inputs drive most of the outcome: the appreciation rate and whether rent keeps up with costs. Principal paydown is the most predictable pillar, because a fixed-rate loan's amortization schedule sets it in advance. To see how these returns compare with an index fund over the same period, read real estate vs stocks. For where rental income fits among other kinds of income, see what passive income is.