Credit shelter trust versus portability

A credit shelter trust is a trust funded at the first spouse’s death with property valued up to the federal exclusion that spouse still had available. Two other names for the same idea are the bypass trust and the family trust. The surviving spouse can usually take the income, and often principal for health or support, but the survivor never owns the property outright. Because ownership does not pass to the survivor, the trust and every dollar it earns afterward stay outside the survivor’s taxable estate at the second death. Portability takes the other road. The executor of the first estate hands the unused exclusion, known as the deceased spousal unused exclusion, to the widow or widower by filing a federal estate tax return on Form 706 even when no tax is owed. Nothing has to be retitled and no separate trust has to be administered afterward. Income from assets left outright to a survivor keeps landing on the survivor’s own Form 1040, the return our individual tax return team prepares each spring.

The case for a credit shelter trust is growth. Say the first spouse dies with 4,000,000 dollars of exclusion left and the family funds the trust with 4,000,000 dollars of marketable securities. If that portfolio doubles to 8,000,000 dollars over the survivor’s remaining years, the whole 8,000,000 dollars sits outside the second estate. Under portability the survivor instead carries a fixed 4,000,000 dollar deceased spousal unused exclusion that does not grow with inflation and does not grow with the market. The same doubling would leave 4,000,000 dollars of appreciation exposed at the second death, and at a 40 percent rate that is 1,600,000 dollars of tax the trust route would have avoided. Remarriage is the other pressure point. A survivor may only use the unused exclusion of the last deceased spouse, so a widow who remarries and then outlives the second husband can lose the first husband’s exclusion outright. Trust earnings are still reported the ordinary way, and the investment rules in Publication 550 and the gain reporting on Schedule D apply to a trust much as they apply to a person.

The error we see most often has nothing to do with drafting and everything to do with a missed filing. Portability is not automatic. If nobody files the first estate’s return, the unused exclusion simply disappears, and families learn this years later while settling the survivor’s estate. An estate that was not otherwise required to file can sometimes still make a late election under a simplified procedure the IRS created, but that relief carries a deadline of its own and it does not reach an estate that was large enough to require a return in the first place. A second frequent slip is funding the trust with the wrong asset. Retirement accounts carry income tax with them and rarely belong in a bypass trust without careful review, because every distribution arrives as ordinary income reported on Form 1099-R. We keep the funding schedule and the historic basis records for each item that goes into the trust, work our bookkeeping group handles month to month instead of reconstructing it a decade later from bank statements nobody kept.

Picking between a credit shelter trust and portability is a modeling exercise rather than a matter of preference. We run both paths against your actual holdings and your state of residence, then give the comparison to the attorney who drafts the document. The Reed Corporation is a certified public accounting and tax firm. We do not practice law and we do not draft trust instruments, so the document belongs to your attorney and any valuation opinion belongs to a qualified appraiser. What we handle is the tax side of the question, the arithmetic behind the choice and the returns that follow it once a decision is made. Federal exclusion amounts move with inflation and with whatever Congress does next, and state thresholds move on a schedule of their own, so a plan built around today’s numbers deserves a fresh look every few years rather than sitting untouched in a drawer.

Yes, and that trade is the heart of the decision. Section 1014 gives property included in a decedent’s gross estate a new basis equal to its fair market value on the date of death. Property sitting in a bypass trust is deliberately kept out of the survivor’s gross estate, which is the entire point of the structure, so there is no second adjustment when the survivor dies. Assets left outright to a survivor under portability get that second reset in full. The basis rules are laid out in plain terms in Publication 551, and they cut both ways, because a holding that has fallen in value is stepped down rather than up. For a family whose combined wealth sits comfortably below the federal exclusion, the income tax saving from a second step-up usually beats an estate tax saving they were never going to need in the first place.

Numbers make the point better than theory. Suppose the trust holds stock the couple bought for 300,000 dollars that was worth 1,200,000 dollars when the first spouse died, so the trust takes a 1,200,000 dollar basis at that moment. The survivor lives another eighteen years and the position grows to 2,000,000 dollars. If the trustee sells, the 800,000 dollars of growth after the first death is taxable gain, reported on Form 8949 and carried to Schedule D. At a 20 percent federal capital gain rate plus the 3.8 percent net investment income tax figured on Form 8960, that comes to roughly 190,400 dollars. Had the same shares been held outright by the survivor under portability, the basis would have reset to 2,000,000 dollars at the second death and that gain would have vanished. Trusts also reach the top federal bracket and the net investment income tax threshold after only a few thousand dollars of retained income, which makes a trust an expensive place to park a large unrealized gain.

The comparison tilts back toward the trust only when estate tax is genuinely in play. The top federal estate rate is 40 percent while long term capital gain plus the net investment income tax tops out near 23.8 percent, so keeping appreciation outside a taxable estate is worth more than a basis reset once the family clears the exclusion. Below the exclusion the math flips the other way. Here is the mistake that costs families real money. Older documents, many of them written when the exclusion was 675,000 dollars or 1,000,000 dollars, contain a mandatory formula that funds the bypass trust with the largest amount that can pass free of federal estate tax. Applied against today’s much larger exclusion, that clause can sweep nearly the entire estate into the trust, leave the survivor with far less outright than the couple intended, and surrender a step-up nobody needed to give up. We read those funding formulas before the first death, not after, because afterward the options narrow quickly.

Careful drafting can soften the trade. An attorney can build in a limited power that lets an independent trustee grant the survivor a general power of appointment over selected low basis assets, which pulls those items back into the second estate and restores the step-up while leaving high basis property outside. Disclaimer funded trusts and a delayed marital election give a family nine months after the first death to decide with real numbers instead of guessing years ahead of the event. Those are drafting choices your lawyer makes, not choices a tax preparer should make. Our part is the modeling and the reporting that follows, which begins on our tax strategy consulting page and continues through the individual tax returns the survivor files every year. Guard the basis records as carefully as the trust language, because the step-up question will ultimately be settled by whatever documentation exists on the day someone finally sells.

State law decides this question for a great many families who will never owe a dollar of federal estate tax. Roughly a dozen states plus the District of Columbia run an estate tax of their own, and their exclusion amounts sit far below the federal figure. Oregon still starts at 1,000,000 dollars. Massachusetts sits at 2,000,000 dollars. Illinois taxes estates above 4,000,000 dollars and publishes its guidance through the Illinois Department of Revenue. New York runs a basic exclusion in the seven figures with a cliff that wipes out the exclusion entirely once an estate exceeds it by more than five percent, and the New York State Department of Taxation and Finance administers that rule. Washington and Minnesota tax estates well below the federal line as well. Most of these states do not allow any portability of their own exclusion, and the handful that do are the exception rather than the pattern.

That single fact drives the answer. If a state exclusion cannot be handed to the survivor, the only way to use the first spouse’s state exemption is to move property out of the survivor’s estate at the first death, which is exactly what a credit shelter trust does. Take an Illinois couple holding 8,000,000 dollars between them. Rely on portability alone and the survivor eventually dies owning the full 8,000,000 dollars with a single 4,000,000 dollar state exclusion available, leaving 4,000,000 dollars exposed to an Illinois rate that climbs toward 16 percent, a bill in the neighborhood of 600,000 dollars. Fund a state level bypass trust with 4,000,000 dollars at the first death and that exposure largely goes away while the federal picture stays unchanged. Where the state and federal thresholds differ, attorneys often solve the mismatch with a separate state only marital election, so the two systems can be funded at two different amounts out of one estate.

The mistake here is usually geographic. Families move to Florida or Texas, tell themselves the state estate tax problem is behind them, and quietly keep the Manhattan apartment or the Illinois farmland. Nearly every estate tax state reaches real property and tangible property located inside its borders no matter where the owner lived at death, and it prorates its tax by the share of the estate sitting in state. A couple that retires to Naples while holding a 2,000,000 dollar co-op in New York City still has a New York estate filing to think about. A second mistake is treating the funding decision as a one time event. State exclusions change, sometimes with little warning, and a trust funded under an old threshold may be holding more or less than the current rule would call for. We pull the survivor’s prior filings and IRS account data through online transcripts whenever we rebuild an estate picture from incomplete records.

Nothing in this answer is legal advice and none of it should be read as a promise about how a particular state will treat a particular estate. The Reed Corporation is a certified public accounting and tax firm. We do not draft trusts and we do not practice law, and we do not give valuation opinions on real estate or business interests, which belong to a qualified appraiser your attorney engages. What we do is quantify the state exposure under both routes, prepare the fiduciary and personal returns that follow, including the survivor’s Form 1040, and track basis under the rules in Publication 551 so nobody is guessing years later. Our tax strategy consulting work and the bookkeeping records behind it keep those figures current. State legislatures revisit estate thresholds far more often than Congress does, so build in enough flexibility to absorb a change instead of assuming today’s number will hold for twenty years.

This is the piece most couples never hear about until it is too late to fix. Portability moves only the estate and gift exclusion. It does not move the generation-skipping transfer exemption, a separate allowance under section 2631 that shelters property passing to grandchildren or to anyone more than one generation below the transferor. That exemption belongs to each person individually and cannot be handed to a surviving spouse, so if the first spouse to die never puts it to work, it disappears with them. A credit shelter trust is the usual place to use it, because the executor can allocate the exemption to that trust and drive its inclusion ratio to zero. Once the ratio is zero, the property and every dollar of later growth stay outside the 40 percent generation-skipping tax for as long as the trust is allowed to run under state law, which in many states is now a very long time.

The compounding is where the value shows up. Suppose the first spouse dies with 5,000,000 dollars of generation-skipping exemption available and the family funds a bypass trust with 5,000,000 dollars, allocating the exemption to it on the estate return. Forty years later the trust is worth 12,000,000 dollars when it finally passes to grandchildren. Because the inclusion ratio is zero, the entire 12,000,000 dollars moves without generation-skipping tax, sheltering roughly 4,800,000 dollars of tax at the current 40 percent rate. Give up the trust in favor of portability and the survivor holds the same property with only her own exemption to spend at the second death, so half of the family’s total exemption was thrown away at the first death in exchange for nothing. Where a marital trust is used instead of a bypass trust, an attorney can preserve the same benefit through a reverse election that treats the first estate as the transferor for generation-skipping purposes only, which is a drafting and election question rather than an accounting one.

Two errors do most of the damage. The first is failing to file the first estate’s return at all, since the allocation of generation-skipping exemption is made on that return and nowhere else. The second is losing track of the trust’s inclusion ratio after later contributions. A trust that starts at zero can be knocked off zero by a single unallocated addition years afterward, and unwinding that is far harder than preventing it. Every trust of this kind needs an employer identification number of its own, applied for on Form SS-4 through the employer identification number application, along with its own bank account and an annual set of books. Interest and dividends then arrive under that number on Form 1099-INT and Form 1099-DIV, and the reporting rules in Publication 550 govern how the trust reports them.

Administration is where otherwise sound plans quietly fail. Our bookkeeping team keeps the trust’s accounts and its basis schedules apart from the survivor’s personal records, and our tax strategy consulting group works alongside the attorney and the appraiser so the values reported year to year line up with the values the estate return originally claimed. The Reed Corporation does not draft trust instruments and does not practice law, and nothing written here is a promise about how the IRS will treat a specific allocation on audit. Generation-skipping planning rewards patience, because the benefit compounds across decades rather than showing up on this year’s return. That is exactly why the exemption is worth using at the first death even in a year when no estate tax is due and the filing feels like paperwork for its own sake.

Our lane is the tax side and nothing past it. The Reed Corporation is a certified public accounting and tax firm. We do not practice law, we do not draft trust instruments or transfer documents, and we do not issue valuation opinions on closely held interests. Your attorney writes the document and decides what its language should say. A qualified appraiser signs the valuation that supports any hard to value asset. We handle the arithmetic that drives the choice, the fiduciary income tax return the trust files each year, the basis and funding records that sit behind it, and the coordination among those people so nobody is working from a stale number. We also read the signed document before the first tax year closes, because trustee distribution powers and the way the instrument defines income change how the annual return is prepared.

Trust income taxation surprises most new trustees. A trust climbs the federal rate table within a few thousand dollars of retained income rather than a few hundred thousand, and the 3.8 percent net investment income tax reported on Form 8960 begins at that same low threshold. Suppose the trust retains 12,000 dollars of interest and dividends in its first full year. Held inside the trust, a large slice of that 12,000 dollars is taxed near the top federal rate and picks up the net investment income tax on the way. Pay the same 12,000 dollars out to a surviving spouse whose other income is modest and the distribution deduction carries the income to her personal return, where it might be taxed at 12 or 22 percent instead. The difference on a single year can run past 2,000 dollars, and across a twenty year administration that becomes real money. Whether distributing is the right answer depends on what the trust was built to do, not on the tax rate alone.

The most common failure has nothing to do with tax law. It is a trust that was signed and then never funded. Deeds go unrecorded, brokerage accounts stay titled in the survivor’s name, no separate bank account is opened, and no annual accounting is prepared, so the trust exists only on paper. When the second death arrives, the IRS and the state look at who actually held the property, and a trust that was never funded shelters nothing at all. The remedy is dull and it works. Retitle the assets, open the account, keep the books, and file the return each year without fail. Quarterly estimated payments for the trust follow the rules in Publication 505 and the general estimated tax guidance, and any letter from the IRS should be answered on time using the explanation of notices and letters.

Families who want the credit shelter trust versus portability question modeled against their own numbers before an attorney drafts anything can request a consultation, and we will build the comparison and sit in on the meeting with counsel. We can also review a document written under an older exclusion to see whether its funding formula still does what the couple actually intended. No plan removes every audit risk and no adviser can promise a particular estate tax result, so the goal is a defensible position backed by records created at the time rather than a guarantee nobody is able to give. Start our side of the work through tax strategy consulting or the individual tax return service the survivor will need every year. Revisit the whole structure after a move to another state or a change in the federal rules, because an answer that fit one year often stops fitting two years later.