Should You Sell Your Denver Home or Rent It Out?

Every Denver homeowner who moves, inherits a property, or upgrades faces this decision. The simple question — “should I sell or rent it out?” — has a genuinely complicated answer, and most calculators online get it wrong by leaving out the parts that matter most.

Use the calculator below to see honest, Denver-specific numbers for your property. Then keep reading to understand why the math works the way it does — and which decision the numbers actually favor for most owners.

What most rent-vs-sell calculators get wrong

The rent-vs-sell question has been around forever, which means the internet is full of tools that try to answer it. Most fail in predictable ways.

They compare apples to oranges. A typical calculator shows your monthly rental cash flow next to the one-time profit from a sale. But those numbers aren’t comparable — one is a monthly figure, the other is a lump sum. The real question is: which path grows more wealth over the next 10 years? That requires modeling both scenarios forward in time, accounting for what you could do with the sale proceeds if you didn’t rent.

They ignore appreciation compounding. A 3% annual gain on a $650,000 Denver home is $19,500 in year one — and about $27,000 in year ten as the home value grows. Over a decade, the compounding is significant.

They ignore rent growth. Rent in Denver typically grows 3–4% per year over long time horizons. A property renting for $2,900 today is realistically renting for $3,900 or more in ten years. Static rent projections make renting look worse than it is.

They ignore the tax traps. This is the big one. Two specific IRS rules can swing the math by tens of thousands of dollars, and almost no consumer calculator handles them correctly.

They ignore opportunity cost. If you sell, you receive a chunk of equity you can invest elsewhere. A fair calculator has to compare “rental wealth at year 10” against “sale proceeds invested at market returns for 10 years.” Otherwise the comparison is tilted toward renting artificially.

The two tax traps most owners don’t know about

If you’re considering renting out a former primary residence, two tax rules deserve your attention before you make any decision. Both can cost tens of thousands of dollars if you don’t plan around them.

The Section 121 exclusion — and the 3-year cliff

If you’ve owned and lived in your home as your primary residence for at least 2 of the last 5 years, you qualify for the Section 121 exclusion on federal capital gains. That means you can exclude $250,000 of gain if you’re single, or $500,000 if you’re married filing jointly — completely tax-free — when you sell.

Here’s the trap: this rule is based on a rolling 5-year window. The moment you’ve been out of the home for more than 3 years, you no longer meet the “2 of the last 5 years” test. You lose the exclusion entirely, and the full appreciation becomes taxable.

For a Denver home that appreciated $200,000 during your ownership, that’s the difference between owing $0 in federal capital gains tax (if you sell while the exclusion still applies) and potentially owing $30,000–$47,000 if you’ve been renting it out too long. This is real money, and it’s invisible until the tax bill arrives.

The practical implication: if you’re considering renting out your former primary residence, you have roughly a 3-year window where you can still sell and preserve the exclusion. After that, the math shifts materially toward continuing to rent or executing a more complex strategy like a 1031 exchange. Talk to a CPA about your specific timeline.

Depreciation recapture

When you rent a property, the IRS requires you to depreciate it over 27.5 years — it’s not optional. Whether or not you actually take the depreciation deduction on your taxes each year, the IRS treats it as if you did. That means when you eventually sell, every dollar of accumulated depreciation is “recaptured” and taxed at up to 25% federally (plus your state rate).

For a $475,000 cost basis property rented for 10 years, that’s roughly $138,000 of accumulated depreciation — and about $35,000–$40,000 in recapture tax owed on sale. Most rent-vs-sell calculators completely ignore this. Ours doesn’t.

There’s a silver lining: the annual depreciation deduction during rental years reduces your taxable rental income, which saves you meaningful tax along the way. We don’t model that benefit in the calculator because your personal tax situation determines how much it’s worth, but it’s real and it partially offsets the eventual recapture.

What the numbers actually favor for most Denver owners

Short horizons often favor selling. If your planning horizon is 3 years or less, the Section 121 exclusion works in your favor and the math often tips toward selling. Transaction costs are front-loaded and compounding benefits haven’t kicked in yet.

Long horizons often favor renting. At 10+ year horizons, the combination of continued appreciation, rent growth, and mortgage paydown tends to beat selling-and-investing — but only if your rent is solid relative to your carrying costs.

Mid-range horizons (5–10 years) are genuinely uncertain. This is where your specific inputs matter most. Use the break-even appreciation rate shown in the calculator results to understand how sensitive your decision is. Small changes in assumptions can flip the result either way.

High-carrying-cost properties rarely make sense as rentals. If your mortgage P&I plus property tax, insurance, and HOA eats most or all of market rent, renting means you’re subsidizing a speculative bet on appreciation. That’s a legitimate strategy — but it should be an informed choice, not an accidental one.

What the calculator can’t tell you

Even with thorough math, there are factors that genuinely affect the right decision that no model can capture.

Can you handle being a landlord? Colorado has strict habitability timelines (24 hours for heat, water, plumbing, year-round). Fair Housing rules are unforgiving. Tenants call at inconvenient times. If you’re not set up to handle these, the math saying “rent” doesn’t actually favor you. Take our 2-minute readiness quiz →

How concentrated is this in your net worth? A rental property is typically your largest single asset. For some owners, keeping it means putting a meaningful percentage of their net worth into one uninsurable-against-total-loss investment in one city. Selling and diversifying may be the right call even if the model says “rent.”

What’s your actual tax situation? This calculator uses reasonable assumptions, but your specific marginal rate, other capital gains or losses, state-specific rules, and potential 1031 exchange options can change the math significantly. Before acting on any result, talk to a CPA.

What’s your liquidity? If the cash from a sale would fundamentally change your financial security — paying off other debt, funding retirement, buying a primary residence — the practical value of that cash may outweigh a mathematically optimal rental return.

Frequently asked questions