Capital Gains on a Second Home Sale | What Wisconsin Lake House Owners Owe in 2026

You bought the lake house for Geneva Lake summers. Now it's worth far more than you paid. Here's the catch: capital gains on a second home sale get none of the big tax breaks your main home gets. The IRS treats a vacation home as a capital asset, so the profit is taxable.

By the end of this guide, you'll know which 2026 rates apply, how Wisconsin taxes out-of-state owners, how to estimate your bill before you list, and five legal ways to shrink it.

Why Selling a Second Home Is Taxed Differently

Sell your main home and you can often skip tax on up to $250,000 of profit ($500,000 for married couples). But that break only covers a home you lived in for two of the last five years, according to the IRS. A weekend lake house doesn't qualify.

Around Geneva Lake, that profit can be big. Redfin reported a median sale price of $763K in Fontana-on-Geneva Lake in February 2026, up 6.2% from a year earlier.

Capital Gains Tax Rates on a Vacation Home in 2026

In 2026, profit on a second home held more than one year is taxed federally at 0%, 15%, or 20%, plus a 3.8% surtax for higher earners. Wisconsin then taxes 70% of that gain at its regular income tax rates, which top out at 7.65%. Depreciation from rental use is taxed separately at up to 25%.

Federal long-term rate: Married couples pay 15% on gains until taxable income passes $613,700, then 20% above that, per IRS Revenue Procedure 2025-32.

Net Investment Income Tax: An extra 3.8% applies once modified adjusted gross income passes $250,000 for married couples or $200,000 for single filers (IRS Topic 559).

Depreciation recapture: If you ever rented the home and claimed depreciation, that portion is taxed at up to 25% (IRS Topic 409).

Wisconsin: The state lets you deduct 30% of net capital gain on assets held more than a year (Wisconsin DOR Publication 103). The rest is taxed at rates from 3.5% to 7.65% (Wisconsin DOR rate schedule).

Short-term sales: Sell within a year of buying and the gain is taxed as ordinary income, with no Wisconsin 30% deduction.

Live in Illinois? Wisconsin Still Gets Paid

Many Geneva Lake owners live in the Chicago area. That doesn't take Wisconsin off the hook. The Wisconsin Department of Revenue says any gain on Wisconsin real estate must be reported to Wisconsin, no matter where the owner lives.

Two details catch sellers off guard. You must file Form 1NPR if your Wisconsin gross income is $2,000 or more. And estimated tax on the gain is due on the date of sale, not next spring. Your home state may also tax the gain, often with a credit for tax paid to Wisconsin. Ask your CPA how that nets out.

How to Estimate Your Tax Before You List

Run these numbers with your CPA at least 60 days before listing:

1. Find your purchase cost. Your original closing statement shows purchase price plus certain closing costs, your starting basis.
2. Add capital improvements. A new pier, roof, or kitchen adds to basis; routine repairs don't (IRS Topic 703).
3. Subtract any depreciation. If you rented the home, depreciation on past returns lowers basis and is taxed at up to 25%.
4. Estimate your net sale price. Start with our What's My Home Worth tool, then subtract commission, title, and closing costs.
5. Calculate the gain. Net sale price minus adjusted basis equals your taxable gain.
6. Apply the rates. Stack the gain on your other income to find your federal bracket, add 3.8% if you're over the surtax line, then apply Wisconsin rates to 70% of the gain.
7. Plan the payment. Set cash aside at closing for Wisconsin's estimated payment and your federal quarterly estimate.

An Illustrative Example

Consider a Chicago couple who bought a Geneva Lake area home in 2014 for $600,000, added $150,000 in improvements, and never rented it. They sell in 2026 for $1,150,000 with about $70,000 in selling costs. Their other taxable income is $300,000.

Taxable gain: $1,080,000 net proceeds minus $750,000 basis equals $330,000.

Federal capital gains tax: $313,700 at 15% plus $16,300 at 20% equals $50,315.

Net Investment Income Tax: $330,000 times 3.8% equals $12,540.

Wisconsin: 70% of the gain, or $231,000, is taxable. At 5.3% to 7.65%, that's roughly $12,200 to $17,700. Wisconsin's nonresident proration formula will fine-tune the exact figure.

Planning total: About $75,000 to $80,500, or 23% to 24% of the gain, before any home-state tax.

Now change one fact. Say they had rented the home and claimed $60,000 in depreciation. Their basis drops to $690,000, the gain grows to $390,000, and that $60,000 slice is taxed at up to 25% federally instead of 15%. Renting helped with carrying costs, but it raised the exit bill.

That number belongs in your pricing plan, not your April surprise. To pressure-test your own figures, talk with Legendary about pricing and a sale timeline you can bring to your CPA.

5 Ways to Lower Capital Gains on a Second Home Sale

1. Make it your main home first. Live there two of five years to unlock part of the exclusion. Pros: can shelter real money. Cons: vacation-home years after 2008 count as "nonqualified use," and that slice stays taxable (IRS Publication 523).

2. Use a 1031 exchange, if it was a rental. Pure vacation homes don't qualify. The IRS safe harbor requires 24 months of ownership, at least 14 days of fair-market rental each year, and limited personal use (The Tax Adviser, AICPA). Pros: defers the entire tax. Cons: strict deadlines, and the replacement must also be an investment. Weighing a trade into another area property? Our Geneva National second home investment guide covers what investors look for.

3. Sell in a lower-income year. A retirement year can keep more of the gain in the 15% bracket and under the surtax line. Pros: simple. Cons: waiting carries market risk.

4. Document every improvement. Each receipt cuts the gain dollar for dollar. Pros: free. Cons: needs records.

5. Hold it for your heirs. Under current law, inherited property generally gets a basis reset to its value at death (IRS Publication 551). Pros: can erase decades of gain. Cons: you never get the cash, and tax law can change.

The Bottom Line

Capital gains on a second home sale can take a quarter of your profit once federal, surtax, and Wisconsin taxes stack up. Owners who keep more plan early: they tally improvements, pick the right year, and price with the tax bill in mind. This guide is education, not tax advice; your CPA should confirm your numbers.

Ready to see what your lake house would sell for and map a smart timeline? Contact Legendary for a no-pressure pricing conversation.

Frequently Asked Questions

Do I pay capital gains tax when I sell my vacation home?

Yes. The IRS treats a vacation home as a capital asset, so profit above your adjusted basis is taxable. The $250,000 or $500,000 home sale exclusion only covers your main home. If you held the property more than one year, the gain qualifies for federal long-term rates of 0%, 15%, or 20%, and Wisconsin excludes 30% of it before applying state rates.

Can I avoid capital gains tax on a second home by moving into it?

Partly. Living there as your main home for two of the five years before the sale can unlock the home sale exclusion. But gain tied to years it was a vacation home after 2008 counts as nonqualified use and stays taxable. Any depreciation you claimed while renting it is also taxable at up to 25%, even if you qualify.

Does Wisconsin tax nonresidents who sell a lake house?

Yes. The Wisconsin Department of Revenue requires anyone selling Wisconsin real estate to report the gain, regardless of where they live. Nonresidents file Form 1NPR if their Wisconsin gross income is $2,000 or more. Estimated tax on the gain is due on the date of sale, even if you had no Wisconsin filing requirement the year before.

Can I do a 1031 exchange on a vacation home?

Only if it qualifies as investment property. The IRS safe harbor in Revenue Procedure 2008-16 requires owning the home for 24 months before the exchange, renting it at a fair price for at least 14 days in each of those two years, and limiting personal use to 14 days or 10% of rented days, whichever is greater.

How much is capital gains tax on a second home in Wisconsin?

Wisconsin deducts 30% of net long-term capital gain and taxes the remaining 70% at regular income tax rates, which range from 3.5% to 7.65%. That works out to an effective state rate of roughly 2.5% to 5.4% of the total gain. Federal long-term rates and the 3.8% Net Investment Income Tax apply on top of the state tax.