How Estate Planning Costs Rise with Complexity

A revocable living trust package for a married couple runs $3,500 to $6,000 in most metro markets. A multi-trust structure layering a SLAT, an ILIT, and a dynasty trust starts at $30,000 and can exceed $350,000. Same family, same goal — moving wealth to heirs efficiently — and a 60-fold spread in legal cost. The variable is not the attorney’s hourly rate. It is structural complexity, and complexity is something a $150k+ household chooses, not something the tax code imposes.

That distinction matters more in 2026 than it did two years ago. The One Big Beautiful Bill Act, signed July 4, 2025 (Public Law 119-21), set the federal estate tax exemption permanently at $15 million per person and eliminated the scheduled 2025 sunset that would have dropped it to roughly $7 million. Per the IRS (Revenue Procedure 2025-32), the 2026 exemption is $15 million per individual, $30 million for married couples using portability. For most households reading this, federal estate tax is now a non-issue — which means the case for spending $50,000 on trust machinery has to be made on grounds other than the federal estate tax bill.

The cost ladder, rung by rung

Estate planning cost does not rise smoothly with net worth. It steps. Each step corresponds to a structural decision that adds drafting time, a separate legal entity, or an ongoing compliance obligation. Here are the rungs, drawn from 2025–2026 attorney pricing data.

Sources: IRS Rev. Proc. 2025-32 (exemption, rate); Legaltemplates.net 2026 nationwide study of 909 firms; Boland Law Group 2025 AZ fee guide; Heritage Law Office irrevocable trust fee data. Ranges reflect attorney flat fees, not third-party costs.

The bottom rung is documents, not structure. A will-based package — last will, financial power of attorney, healthcare directive, HIPAA authorization — runs $1,500 to $2,500 according to 2026 regional pricing guides. will versus trust cost comparison is the first real fork: a revocable living trust package adds probate avoidance and privacy and costs $2,500 to $4,500 for an individual, $3,500 to $6,000 for a couple, per Allenby Law’s 2026 San Diego data. Both of these are within reach of any household at this income level, and neither does anything for federal estate tax — a revocable trust is included in your gross estate.

Complexity enters with irrevocable structures. The moment an asset leaves your estate for tax purposes, you have created a separate legal entity with its own taxpayer ID, its own annual filing, and frequently its own trustee. That is where the cost curve bends.

What each irrevocable structure actually costs

Three trust types dominate planning conversations for the $5M–$25M range. Each solves a different problem, and each carries a distinct cost profile split between setup and ongoing administration. The setup fee is the number people fixate on; the annual cost is the one that compounds.

Sources: Heritage Law Office (ILIT Crummey and administration ranges); Opelon 2026 CA HNW package data ($5,000–$50,000 for SLAT/GRAT/ILIT/GST); Boland Law Group 2025 ($30,000–$350,000+ for layered advanced plans); IRS Form 1041 instructions (trust filing required at $600 gross income). Annual percentages apply to institutionally managed trusts.

Take the ILIT for life insurance first, because it is the cheapest entry into irrevocable planning and the most frequently justified. A policy you own outright is included in your gross estate at face value under IRC §2042. Move it into an ILIT — owned by the trust for at least three years before death to clear the §2035 lookback — and the death benefit sits outside the estate. Setup runs $3,000 to $8,000. The recurring cost is the part people underestimate: each premium gift requires Crummey notices to beneficiaries, which a firm or trustee administers for $250 to $1,000 a year, plus a fiduciary fee if a bank holds the trust.

GRATs occupy a different cost logic. The GRAT mechanics and tax arbitrage depend on assets outperforming the IRS §7520 hurdle rate; you retain an annuity stream and pass the excess appreciation to heirs gift-tax-free. Drafting is more involved than an ILIT — $5,000 to $15,000 and up — and because GRATs are typically structured as short-term, rolling vehicles, a household running a GRAT ladder pays that drafting cost repeatedly. The annual administration is modest per trust, but the strategy’s entire premise is volume.

SLATs are the priciest of the three to run, not to build. Setup tracks GRAT territory, but a SLAT setup and ongoing fees analysis has to weigh ongoing trustee cost, because a SLAT is irrevocable and often institutionally trusteed for the life of the beneficiary spouse. Heritage Law Office data puts irrevocable trust tax preparation at $500 to $2,500 a year and broader bookkeeping and accounting at $500 to $5,000+, before any percentage-based trustee fee of 0.5% to 2% of assets. On a $5 million SLAT, a 1% trustee fee alone is $50,000 a year — dwarfing the setup cost by an order of magnitude annually.

The exposure that justifies the spend

Here is the analytical core, and the part most cost coverage skips: whether any of this expense is warranted turns entirely on the gap between net worth and exemption. I ran the Finluxy Estate Tax Exposure Index for representative net worth points across the cluster’s $5M–$25M target range, under two scenarios — current permanent law, and the counterfactual ~$7 million exemption that would have taken effect had OBBB not eliminated the sunset.

Methodology: (net worth − available exemption) × 40%. Current exemption per IRS Rev. Proc. 2025-32 ($15M/person, $30M married via portability). Counterfactual sunset figure (~$7M/person, ~$14M married, inflation-adjusted) reflects the pre-OBBB scheduled 2026 reversion that Public Law 119-21 eliminated. Assumes full exemption available, no prior lifetime gifts, no state-level tax. Illustrative only.

Read the “estate tax now” column and the spending logic inverts. Across the entire $5M–$25M band, the current-law federal estate tax is $0 for a married couple, because $30 million of combined exemption swallows even a $25 million estate. The structures that cost $30,000 to $350,000 to build buy zero federal estate tax savings for these families today. That is the finding most articles bury under trust mechanics: for the cluster’s target net-worth range, the federal estate tax case for advanced planning largely evaporated on July 4, 2025.

The exposure lives in the counterfactual — and in two real risks the table cannot fully capture. The sunset column shows what these families dodged: a $25 million couple went from a $4.4 million potential tax bill to zero. That history is why TCJA sunset exemption risk dominated planning through early 2025, and why some families who acted pre-sunset now hold irrevocable structures built for a threat that did not materialize. Permanence in tax law means “until the next Congress.” And state estate taxes, which this federal analysis excludes, still bite at far lower thresholds.

Where the real money goes for these families

Strip out federal estate tax and the cost-benefit of estate planning for a $5M–$25M household reorganizes around three things that survived OBBB intact: probate avoidance, state-level tax, and basis.

Probate is a concrete, quantifiable cost. California statutory probate on a single home routinely runs $40,000 to $80,000 under Probate Code §10810; a $3,500 to $6,000 revocable trust package that avoids it is straightforward arithmetic, independent of any estate tax question. State estate and inheritance taxes are the second driver — Massachusetts taxes estates above $2 million, Oregon at $1 million, and five states levy inheritance taxes on heirs regardless of estate size. The federal $15 million exemption does nothing for a Massachusetts decedent at $4 million. Mapping estate versus inheritance tax by state is now the higher-yield analysis for most of these households than federal exemption planning.

Basis is the third, and it cuts against irrevocable trusts. Assets passing through your estate at death receive a stepped-up basis under IRC §1014. Assets you gift into an irrevocable trust during life generally carry over your original basis. For a family whose estate sits comfortably under $30 million, gifting appreciated stock into a SLAT to “save” a nonexistent estate tax can hand heirs a capital gains bill that a simple hold-until-death would have erased. The gifting appreciated assets tax tradeoff is the quiet cost that advanced-planning brochures rarely price in.

The low-cost tools that still earn their keep

Not every wealth-transfer move requires a five-figure structure. The cheapest tool in estate planning costs nothing in legal fees beyond a tax return: annual exclusion gifting. For 2026 the IRS sets the annual gift tax exclusion at $19,000 per recipient per donor; a married couple electing gift-splitting moves $38,000 per recipient per year with no use of lifetime exemption and no gift tax. The annual gifting strategy math compounds quietly: a couple gifting the maximum to three children and three grandchildren moves $228,000 a year out of their estate, $2.28 million over a decade, for the cost of a Form 709 filing.

Portability is the other underused, low-cost mechanism. Portability election for surviving spouses lets a surviving spouse claim the deceased spouse’s unused exemption — the reason a couple reaches $30 million of combined shelter — but it is not automatic. The executor must file Form 706 at the first death even when no tax is owed. Skip that filing and you can forfeit up to $15 million of exemption, a far more expensive mistake than any drafting fee. The federal estate tax exemption and rate structure that makes portability worth electing is detailed in our federal estate tax exemption and rate data.

Methodology

What a $150k+ household should weigh

Income of $150k+ does not put a household near the $15 million exemption, but it is the income band where these decisions get made — for aging parents, for a family business, or for an estate inflated by life insurance and retirement accounts that looks modest on paper. The reframing after OBBB is direct: stop buying federal estate tax insurance you no longer need, and redirect that budget toward the costs that survived. A $4,000 revocable trust that sidesteps $60,000 of probate is a better trade than a $40,000 SLAT defending against a federal tax bill of zero.

The threshold questions are concrete. Does your state impose its own estate or inheritance tax at a low exemption — the single fact most likely to justify real planning spend below $15 million? Have you filed, or will your executor file, the Form 706 needed to lock in portability? Are you about to gift appreciated assets into an irrevocable trust and trade a free basis step-up for a capital gains liability your estate would never have triggered? For families genuinely above $30 million, advanced structures still earn their cost, and the full estate planning cost guide for $5M to $25M net worth walks the layered options. For everyone below it, the most expensive error in 2026 is paying for complexity calibrated to a tax that the law no longer imposes — a calculation worth running with an estate attorney and CPA before signing anything, precisely because the right answer now depends more on your state and your basis than on the federal exemption.