A mother in Sheepshead Bay buys a house in 1990 for $100,000. She holds it for decades. She loves her children, and she wants to make things easy for them, so one day she signs the house over to her son while she is still alive.

It feels like the loving thing to do. It also hands her son a tax bill he never sees coming.

The reason sits inside a rule most families never hear about until it is too late to use it. It is called the step-up in basis, and it decides how much tax an heir pays when they sell an inherited home, stock, or other asset.

Here is what it does, and why the timing of a transfer matters more than the paperwork signed at closing.

What a Step-Up in Basis Actually Means

Every asset has a cost basis. That is what the original owner paid for it. When you sell, you owe capital gains tax on the difference between the sale price and your basis.

Buy a home for $100,000, sell it for $700,000, and the taxable gain is $600,000.

The step-up in basis changes that math at death. When an owner dies and passes an asset to an heir, the basis resets to the market value on the date of death. The old purchase price no longer matters.

So if that same $100,000 house is worth $700,000 when the mother passes, her son inherits it with a new basis of $700,000. If he sells it for $710,000 a few months later, he owes tax on $10,000, not on $610,000.

That single reset can erase most of a lifetime of appreciation. In a Brooklyn scenario like this one, the savings run into hundreds of thousands of dollars.

Why This Matters More Now Than It Used To

For years, families worried about the estate tax. Today the federal estate and gift tax exemption sits at $15 million per person and $30 million for a married couple.

Less than one percent of Americans owe federal estate tax under those numbers.

For almost every middle-class family in Brooklyn and Queens, the estate tax is not the concern. The income tax impact is. That is where the step-up in basis does its real work, quietly protecting the value your heirs receive.

The Brownstone Example Every Brooklyn Family Should Understand

Consider a brownstone bought decades ago for $500,000 that is now worth $3 million. Many families in Park Slope, Bay Ridge, and Bedford-Stuyvesant hold homes that followed this exact curve.

Sell that home today and the taxable gain is $2.5 million.

Pass it to your heirs at death, and their basis becomes $3 million. The capital gains tax on that $2.5 million of appreciation disappears. Your family keeps the full value of what you built.

💡 The same house, handed to the same child, produces a very different tax bill depending on whether it moves during your life or passes at your death.

The Mistake That Costs Families the Most

This is the part that catches loving parents off guard.

The step-up does not apply to lifetime gifts. When you give an appreciated asset to your child while you are alive, your basis carries over to them. They inherit your low purchase price along with the property.

Back to the mother in Sheepshead Bay. Because she signed the house over during her life, her son keeps her original $100,000 basis. When he sells for $710,000, he owes tax on $610,000 of gain.

Had she left the house to him at death, his basis would have stepped up and most of that tax would have vanished.

The carryover basis rule is why generosity delivered too early can hand the next generation a burden no one intended.

⚠️ Transferring your home to a child before death often feels safe. In many cases it removes the very tax benefit that would have protected them.

How to Think Through Your Own Transfer

Here is a plain way to walk through the decision before you sign anything.

1. Trace the asset to the moment it gets sold

The tax bill does not arrive when you transfer the property. It arrives when your heir sells it. Look forward to that day and ask what basis they will carry.

2. Separate what a tool looks like from what it does

A deed transfer to your child looks like protection. Its real mechanical effect is to lock in your old basis. Test every arrangement against what it actually does at sale, not how it feels at signing.

3. Name the trade riding alongside the advantage

Some tools remove an asset from your estate. That can be useful. It can also strip the step-up your heirs would have received.

This is the central tension in irrevocable trust planning. If you keep enough control for the property to stay in your estate, it gets the step-up. If you fully give it away, the trust holds the property at your original basis and the step-up is gone.

For families well below the estate tax exemption, giving up the step-up to avoid an estate tax you would never owe usually costs more than it saves.

4. Know which assets never get the step-up

Retirement accounts sit outside these rules. Inherited IRAs and 401(k)s do not receive a step-up. Distributions are taxed as ordinary income, and most non-spouse heirs must empty the account within ten years under the SECURE Act.

Plan those assets separately from your home and investment accounts.

5. Keep the documentation your heirs will need

To claim a step-up, your family has to prove the asset's value on your date of death. Many families never record it. That gap creates delays, confusion, and sometimes a larger tax bill.

A clear record of date-of-death value protects the benefit you set up.

A Note for New York Families

New York gives the step-up at death, the same as most of the country. It also imposes its own estate tax on top of the federal one, which shapes how larger estates should be planned.

There is one more wrinkle worth knowing. New York is a common law state, not a community property state.

When a married couple in a community property state loses one spouse, jointly held assets can receive a full step-up on both halves. In New York, only the deceased spouse's half steps up. The surviving spouse keeps the original basis on their own half.

That difference means New York families need a plan built for New York law, not a template borrowed from somewhere else.

The Real Lever Is Set Years in Advance

Whether your child keeps or loses the tax advantage on your home is decided long before the sale. It is set by how and when the asset moves.

The saving is engineered while you are still alive. It is not discovered at the closing table.

This is why an estate plan is worth building with care. There is no single tool that fits every family. A step-up saved for one household is a step-up lost for another, depending on the structure chosen.

Talk It Through Before You Sign

If you own a home in Brooklyn or Queens and you are thinking about passing it to your children, the timing of that transfer will shape their tax bill for years.

Theodore Alatsas and the team at Alatsas Law Firm in Sheepshead Bay work with middle-class families through exactly these decisions. The process starts with education, then walks you through the choices so your plan reflects your wishes and protects the people you are planning for.

Call us at 2115 Avenue U in Brooklyn before you move an asset. A short conversation now can save your family from a tax bill they never needed to pay.