Selling a Home You’ve Owned for 30 Years? The Capital Gains Exclusion Probably Won’t Save You

You bought your house in the mid-’90s. You raised your kids there, paid down the mortgage, and watched the neighborhood transform around you. Now you’re thinking about selling. Maybe you’re hoping to downsize, move closer to the grandkids, or just free up equity that’s been sitting in your walls for three decades.

And somewhere in the back of your mind, you’re thinking, “We’re married, so we get that $500,000 exclusion. We should be fine.”

But here’s the thing: For a lot of longtime Southern California homeowners, that exclusion runs out faster than they expect. And what’s left over is taxable in a way that can catch people off guard.

What the Exclusion Actually Does

Let’s start with the basics. Under federal law, when you sell your primary residence, you can exclude up to $500,000 if you’re married and filing jointly, or $250,000 if you’re single. To qualify for the exclusion, you need to have owned and lived in the home for at least two of the past five years. In many cases, that’s not the tricky part.

The tricky part is what happens when your gain is much bigger than $500,000.

That exclusion was written into law in 1997. It has never been adjusted for inflation. Meanwhile, home values in the Inland Empire, the San Gabriel Valley, and across greater Los Angeles have climbed steadily for decades. A house that sold for $275,000 in 1995 might go for over a million today. The law didn’t keep up with the market.

Let’s Run the Numbers

Here’s a scenario we often see a version of.

You bought your home in 1995 for $275,000. Over the years you put about $50,000 into it: a kitchen remodel, a new roof, landscaping that counts as a capital improvement. That gives you an adjusted cost basis of $325,000.

You sell today for $1.3 million. After selling costs, including commissions, transfer tax, and escrow, let’s say your net proceeds are around $1.22 million.

Your gain is roughly $895,000. But you subtract the $500,000 married exclusion, and that leaves $395,000 of taxable gain.

That is not a hypothetical edge case. That is a pretty ordinary SoCal story.

California Does Not Give You a Break on What’s Left

Here is where it stings more than a lot of people expect.

Federally, long-term capital gains are taxed at preferential rates: 0%, 15%, or 20%, depending on your income. For most pre-retirees with meaningful retirement income, you’re likely looking at 15% or 20% on the federal side.

California is a different story. The state taxes capital gains as ordinary income, meaning the same rate as your wages. There’s no discount for how long you’ve held the asset, no preferential treatment for patience. State rates top out at 13.3% for higher earners.

And if your income is high enough, you may also owe the 3.8% net investment income tax (NIIT) on top of that.

Add it up on that $395,000 taxable gain and you could be looking at a combined tax bill somewhere north of $100,000, depending on your overall income picture that year. That tends to be the number that gets people’s attention.

Here’s Some Good News: Your Basis Is Probably Higher Than You Think

Many people undercount their adjusted cost basis, which means they’re overestimating their taxable gain.

Every capital improvement you’ve made to the home can add to your basis. New roof. Kitchen remodel. Bathroom addition. New HVAC system. ADU construction. Hardscape. Even certain energy-efficient upgrades, minus any tax credits you claimed for them. Each of those receipts can reduce the amount of gain the IRS taxes.

Over 30 years, that can add up to a meaningful number, sometimes $75,000, $100,000, or more. It will not eliminate a large taxable gain, but it can take a significant bite out of it.

If you can dig up old receipts, closing documents, or contractor invoices, do it. If you cannot find everything, do your best to reconstruct what you can and document it. The IRS accepts digital records. This is one of those situations where a little paperwork archaeology is genuinely worth your time.

The Prop. 19 Silver Lining

Here is a California-specific benefit worth knowing about if you are 55 or older.

Thanks to Proposition 19, qualifying homeowners can carry their existing low assessed value to a replacement home anywhere in California, up to three times in their lifetime, as long as the replacement is purchased within two years of the sale. This means that if you have been paying property taxes on a $475,000 assessed value and you buy a new home worth $900,000, less than what you sold your old home for, you may be able to transfer that lower base rather than getting reassessed at the full purchase price. If the new home costs more than the one you sold, the difference is added to your transferred base.

For longtime California homeowners with a very low Prop. 13 base, this is a significant benefit. The income tax picture on the sale may be complicated, but the property tax picture on the replacement home can be quite favorable.

The two sides of this transaction (what you owe when you sell and what you save when you buy) need to be looked at together. Focusing only on one side tends to lead to surprises on the other.

This Is Where Your Financial Plan and the Sale Need to Talk to Each Other

Selling a home you’ve owned for 30 years is not just a real estate transaction. For most people in this situation, it is one of the largest financial events of their retirement. And when something is that significant, it should not be handled in isolation.

A few things worth thinking through before you list:

Timing the sale to a lower-income year. If you’re retiring soon, your income will likely drop. A taxable gain that pushes you into the 20% federal rate bracket in a working year might land at 15% the year after you stop receiving a paycheck. That difference on a large gain is not trivial.

Installment sales. In some cases, particularly when selling to a known buyer, spreading the gain across multiple tax years through an installment sale can reduce the annual tax hit. This is not right for every situation, but it is worth understanding as an option.

Coordinating the proceeds with your retirement plan. A large influx of cash from a home sale can change your retirement income picture, including what you need to draw from your portfolio, how your accounts are allocated, and whether your withdrawal strategy needs to be revisited. This is not a “deposit it and figure it out later” moment.

This is exactly why we integrate our real estate service into your broader financial plan at Evermont Wealth. The sale of your home does not exist in a vacuum. It can affect your tax picture, your retirement income, your estate plan, and potentially your next property purchase. We help clients look at all of those pieces together so that a decision this significant fits into the full picture of where they are headed.

Run the Numbers Before You List

If selling your home is something you’re thinking about in the next year or two, the best time to run these numbers is generally before you’ve accepted an offer.

Start by pulling together what you can: your original purchase documents, a rough estimate of major improvements, and an idea of what your home would sell for today. That gives you a working gain estimate. From there, the tax picture and the planning conversation can follow.

As fiduciary financial advisors, we work with homeowners throughout the Claremont area and across Southern California who are navigating this situation. We can help you understand not just what the home is worth, but what selling it can mean for your finances. If that’s a conversation you’d find useful, we’d welcome it.

You can schedule time at evermont.com or reach us at (909) 296-7977.

Keep building your future.

This material was written in collaboration with artificial intelligence (Claude) derived from sources believed to be accurate. This information should not be construed as investment, tax, or legal advice.