Tax Implications of Downsizing Your Michigan Home: Capital Gains, Property Tax, and Retirement Income
Selling the family home you have lived in for 20 or 30 years usually triggers a meaningful capital gain. For many Michigan empty nesters, that gain is well within the federal exclusion and produces zero tax. For others, especially in higher-priced Michigan markets like Ann Arbor, Birmingham, and Grand Rapids, the gain exceeds the exclusion and creates a real tax bill. This guide walks through the federal and Michigan tax rules every downsizing homeowner should understand before signing anything, plus the property tax implications of moving to a new home.
The Section 121 Capital Gains Exclusion
Federal Section 121 is the most important tax rule for downsizing homeowners. A single filer can exclude up to $250,000 of capital gain on the sale of a primary residence. A married couple filing jointly can exclude up to $500,000. To qualify you must have owned the home and used it as your primary residence for at least two of the last five years before the sale. The two years do not need to be consecutive.
For most Michigan downsizers, this fully eliminates federal tax on the home sale. Long-time owners who bought 20 to 30 years ago often have $200,000 to $400,000 of gain on the family home, which is comfortably under the $500,000 joint exclusion.
How to Calculate Your Actual Gain
Capital gain on a home sale is calculated as: sale price minus selling costs minus your adjusted basis. Most homeowners get this calculation wrong because they forget about basis adjustments. Adjusted basis is the original purchase price plus capital improvements minus any depreciation if the home was ever used as a rental.
Capital improvements include things like room additions, kitchen remodels, new roofs, foundation work, finished basements, deck construction, central air installation, and similar permanent upgrades. Routine repairs and maintenance do NOT count. Painting, replacing the water heater, and patching the driveway are not basis adjustments. New carpets in some cases are, depending on whether they are considered permanent.
Example: a Michigan couple bought a home in 1995 for $120,000. Over the years they spent $35,000 on a kitchen remodel, $18,000 on a finished basement, $9,000 on a new roof, and $12,000 on a deck and patio. Their adjusted basis is $120,000 + $74,000 = $194,000. They sell in 2026 for $410,000 with $25,000 in selling costs. Net proceeds: $385,000. Gain: $385,000 minus $194,000 = $191,000. Well within the $500,000 joint exclusion. Federal tax on the home sale: zero.
When the Gain Exceeds the Exclusion
In higher-priced Michigan markets, especially when one spouse files single (after death of a spouse, after divorce, or for unmarried owners), the gain can exceed the exclusion limit. Single filer exclusion is $250,000. A surviving spouse can claim the full $500,000 exclusion if they sell within two years of the spouse death, but only if certain conditions are met.
Federal long-term capital gains rates in 2026 are 0 percent for taxpayers in the lower brackets, 15 percent for most middle income taxpayers, and 20 percent for those with income above the upper threshold. Michigan adds a 4.25 percent state income tax on the gain.
Example of taxable gain: a widow sells the family home for $700,000 with $30,000 in selling costs and an adjusted basis of $250,000. Net proceeds $670,000. Gain $420,000. Single exclusion $250,000. Taxable gain: $170,000. At 15 percent federal long-term capital gains rate plus 4.25 percent Michigan rate, the tax is roughly $32,725.
This is real money. It is also why proper basis tracking, careful timing of the sale, and thoughtful tax planning matter more for long-term homeowners than they realize.
Surviving Spouse Step-Up in Basis
When one spouse dies, the surviving spouse gets a step-up in basis on the deceased spouse share of the home. In community property states this is a full step-up to current value. In Michigan (a common-law state), the step-up applies only to the deceased spouse half of the property.
Example: a couple bought a Michigan home for $100,000 (basis $100,000). The husband dies when the home is worth $400,000. The wife basis becomes $50,000 (her original half) plus $200,000 (stepped-up half) = $250,000. If she sells the next year for $410,000 with $20,000 in selling costs, gain is $390,000 minus $250,000 = $140,000. Comfortably within her $250,000 single-filer exclusion. Tax: zero.
This step-up is meaningful because it can wipe out years of accumulated gain at the moment of inheritance. Surviving spouses should always document the home value at the date of the spouse death to support the basis step-up.
Michigan Property Tax: What Happens When You Move
Michigan property tax is governed by Proposal A. For owner-occupied principal residences, the cap on annual taxable value increases is the lesser of 5 percent or inflation. Many long-time homeowners have taxable values much lower than their state equalized values because the cap has held the taxable value down for decades.
When you sell, that low taxable value disappears. The new buyer property gets reassessed and the cap resets to current SEV. This is uncapping. It does not affect you (the seller) directly because you are leaving, but it affects what your buyer can pay.
What Happens at Your New Home
When you buy your new home (the downsize home), the same uncapping applies in your favor and against you. The previous owner low taxable value resets to current SEV. Your new property tax bill may be significantly higher than what the prior owner paid. Always check the SEV (not the prior taxable value) when estimating what your taxes will be.
Principal Residence Exemption (PRE)
When you move to your new Michigan home, file a Principal Residence Exemption (PRE) form with the local assessor within 90 days of moving in. The PRE removes the local school operating millage (typically 18 mills) from your tax bill, which on a $200,000 SEV saves about $1,800 per year. Most Michigan downsizers know about this. Some forget to file when they move and leave the savings on the table.
What to Do With the Cash From the Sale
When you downsize, you typically end up with cash left over after buying the new home. Tax planning for that cash is the next layer of decisions.
Investing the Proceeds
Cash from a home sale that qualifies for the Section 121 exclusion is essentially tax-free at the federal level. Putting it into a taxable brokerage account, a high-yield savings account, or other investments is straightforward. The interest, dividends, and capital gains generated going forward are taxable in the year earned.
IRA or Roth IRA Contributions
Home sale proceeds cannot be directly contributed to retirement accounts. The contribution limits are based on earned income, not investment income. But you can use the cash to live on while making contributions from your earned income, effectively using the home equity to fund retirement contributions you might not otherwise be able to afford.
Charitable Giving
Donor-advised funds allow you to contribute appreciated assets (or cash from a home sale) to a charitable account, take the deduction this year, and distribute to charities over time. Useful for downsizers who want to make a major charitable contribution without writing a series of separate checks.
Timing Considerations
When you sell matters. Some considerations: selling in a year when other income is lower may put you in a lower capital gains bracket; selling after age 65 may affect Medicare premiums (high income surcharges or IRMAA); selling before December 31 versus January 1 affects which tax year the gain falls in; and selling in a year of major medical expenses or other deductions may offset the gain.
Documents to Save
Before you sell, gather and save these documents. They support your basis claim and may be needed years later if the IRS asks: original purchase HUD-1 or settlement statement, all receipts and contracts for capital improvements, refinance settlement statements (some closing costs can adjust basis), records of any depreciation if the home was ever rented, and the final closing statement from the sale.
Keep these for at least three years after you file the tax return that includes the sale, and ideally seven years to be safe.
When to Consult a Tax Professional
Most Michigan downsizers can handle the tax aspects of a home sale themselves, especially when the gain is comfortably within the exclusion. Consult a CPA or tax professional before signing if any of the following apply: your gain might exceed the exclusion, you are a surviving spouse and want to confirm the step-up basis math, the home was ever used as a rental property (depreciation recapture rules apply), you are considering using sale proceeds for major financial moves, or you are downsizing as part of a larger life change like divorce or relocation.
Get a Cash Offer for Tax Planning
Tax planning works better when you have firm sale numbers to work from. A no-obligation cash offer from Offer Now Michigan gives you a real price you can plug into your tax projections. Call (810) 547-1135 for a fair offer within 24 to 48 hours.