Credit Shelter Trusts for Massachusetts Residence
Credit shelter trusts are a way to take full advantage of Massachusetts estate tax exemptions. Being a Massachusetts resident we have been very lucky in terms of the appreciation of our real estate and many of my clients don’t realize that they are “millionaires” just by starting to look at their “worth” from their real estate. Massachusetts Estate Tax Laws have two major differences from the Federal Estate Tax Laws.
- An Individual who passes away has a $2.0M Exemption before their estate/beneficiaries will owe an estate taxes. The FEDERAL lifetime gift/estate tax exemption is $13.99 million in 2025. The lifetime gift/estate tax exemption is projected to be $7 million in 2026.
- Massachusetts does not allow for “portability”. The Federal law does. Portability means that spouses may share in their individual exemption, essentially doubling it. So presently a married couple could exempt up to $28M if one of them died in 2025. To have portability requires that the surviving spouse, elects it by filing a Federal Estate Tax Return for the deceased spouse even though no tax may be due).
In Massachusetts the best way to replicate the benefit of portability is the use by both spouses of separate credit shelter trusts. The way to preserve both spouses' exemptions (so potentially $4.0M vs $2.0M) has been to create a "credit shelter trust" (also called an A/B or bypass trust). Simplistically if a couple is worth $3.0M or $4.0M when the first spouse dies and after the surviving spouse is worth $3.0M or $4.0M then when the second spouse dies (assuming the same net worth) the estate tax would be $99,600 for $3.0M and $182,500 for $4.0M. By using these credit shelter trusts, which are unique to married couples, they will use $4.0M in exemptions instead of only having the benefit of $2.0M when the second spouse passes.
Standard estate tax planning is to split an estate that is over the prevailing state or federal exemption amount between spouses and for each spouse to execute a trust to "shelter" the first exemption amount in the estate of the first spouse to pass away. While the terms of such trusts vary, they generally provide that the trust income will be paid to the surviving spouse and the trust principal will be available at the discretion of the trustee if needed by the surviving spouse. Since the surviving spouse does not control distributions of principal, the trust funds will not be included in her estate at their death and will not be subject to tax. This way, in Massachusetts the couple can protect up to $4 million from estate taxation while still making the entire estate available to the surviving spouse if needed.
The rising federal estate tax exemption means that many older trusts drawn up for married couples contain outdated estate-splitting provisions that may cost them dearly in state or federal taxes, or both. As recently as 2020, if you have retirement funds landing in a trust after your death, it is almost a guarantee the language in your trust will not be up to date unless it was amendment after January 1, 2020. Couples would do well to have their revocable trusts that contain credit shelter provisions reviewed by a competent professional.
If you're interested in learning more about CST, contact our office today!

