The True Cost of a $6.5 Million Estate in 2026: Hidden State Taxes and the Rising IRS Rate Coupon-Clipping Can't Fix
The Fed just made your estate plan more expensive, whether you have a plan or not
On Wednesday, the Federal Reserve raised its benchmark rate a quarter point, pushing the federal funds target range to 3.75%–4% — the first hike since 2023 (NerdWallet, "Fed Hikes Rate for the First Time Since 2023"). By Thursday, mortgage rates had already priced it in and pushed past 7% (NerdWallet, "Mortgage Rates Today, Thursday, September 17"). Two headlines, same underlying story: the cost of money just went up, and estate planning math is entirely built on the cost of money.
Here's the part most people miss. While rate-sensitive readers were checking mortgage quotes, the IRS 7520 rate — the number that determines how much a GRAT, GRUT, IDGT, or CRT has to outperform to actually transfer wealth — moved with it. Estimates place the September 2026 7520 rate around 5.0%, up from the low-4% range earlier this year. That single number changes the breakeven math on every trust structure you might be considering, which is exactly what we walked through in IRS 7520 Rate in July 2026 and again in Should You Fund a GRAT Before the Fed's September 16 Rate Decision.
But this post isn't about GRAT vs. IDGT mechanics. It's about something simpler and, for most people, more expensive: the gap between what you think your estate plan costs and what it actually costs when you add up taxes, fees, and the stuff nobody itemizes for you.
Why people optimize the wrong line item
Two other NerdWallet pieces this cycle make an accidental point about estate planning. One is about squeezing credit card points to fund a European vacation — and finding it "still cost a fortune" once flights, fees, and blackout dates were factored in. The other is about crowdsourcing grocery-bill hacks on Reddit to save maybe $50–200 a month.
Both are worth doing. Neither moves the needle compared to what's sitting unaddressed in most people's estate plans. If you're the kind of person who spends an evening optimizing a loyalty program for a $3,000 trip, you should spend at least that much attention on a decision that, as we'll show below, can swing by half a million dollars depending on which of four fairly common paths you take.
This is the same blind spot NerdWallet's home insurance piece describes: "gaps" in coverage that stay invisible until a disaster forces you to find out the hard way. An unfiled portability election, a revocable trust that doesn't actually reduce state tax exposure, or a will nobody's updated since the exemption changed — these are estate-planning "coverage gaps." You don't discover them until someone dies, and by then it's not a phone call to an adjuster, it's a check to the state.
The worked example: $6.5 million, one state, four paths
Here's a concrete scenario. Say you're an unmarried individual with a $6.5 million estate, living in a state with a $1 million state estate tax exemption and no portability at the state level (several states, including Oregon, tax estates starting around this threshold). Assumptions, clearly labeled as an example:
- Estate grows at 6% annually for 10 years (a diversified, moderate-growth portfolio)
- Federal exemption stays around $15 million per person, so federal tax is a non-issue here
- State marginal rate on the taxable excess: roughly 13%, blended across a typical graduated bracket (10%–16% is common in states with estate taxes)
- IRS 7520 rate for trust modeling: 5.0%
Without any moves, that $6.5 million grows to roughly $11.64 million by year 10 (6.5M × 1.06¹⁰). Here's what four different levels of planning do to the total cost at death — taxes plus fees, not just the tax bill:
| Path | What it does | State tax owed | Fees/admin cost | Total 10-year cost |
|---|---|---|---|---|
| A. No planning | Assets pass through probate, no structure | $1,383,200 | $349,200 (probate, ~3%) | $1,732,400 |
| B. Revocable trust + portability filed | Avoids probate; doesn't reduce state tax exposure | $1,383,200 | $10,000 | $1,393,200 |
| C. Annual exclusion gifting ($19,000 × 3 kids/yr) | Removes appreciation from the taxable estate | $1,285,529 | $15,000 | $1,300,529 |
| D. IDGT sale (freezes $2M at inception) | Locks in current value, shifts appreciation out | $1,177,670 | $35,000 | $1,212,670 |
Path C uses the 2026 annual gift tax exclusion of $19,000 per recipient — $57,000/year gifted to three children, growing at the same 6% outside the estate, compounding to roughly $751,000 removed from the taxable base over a decade.
Path D assumes $2 million of the estate is sold into an intentionally defective grantor trust in exchange for a note, with the underlying asset growing at 9% instead of 6% (a reasonable assumption for a concentrated or business asset). The $2.73 million of appreciation above the frozen note value passes to beneficiaries without further estate tax exposure — this is the same freeze mechanic we detailed step by step in GRAT vs. IDGT vs. Portability on a $6M Asset.
The spread between doing nothing and the most sophisticated path here is $519,730 — on an estate that owes zero federal tax. That's the number that should make you pause: the federal exemption headline ("$15 million, you're fine") is true and also almost irrelevant to what actually determines your total cost.
This is the kind of comparison Voritanel runs for you — so you don't have to build a four-row spreadsheet with compounding assumptions by hand every time rates move.
Where the "free lunch" myth breaks down
Notice that even Path D, the most aggressive option, still carries $35,000 in setup and maintenance costs over ten years. No estate planning strategy is actually free — just like NerdWallet's finding that a credit-card-points vacation "still cost a fortune" once you tallied everything. GRATs have gift tax return filing costs. IDGTs need trustee fees, appraisals, and note administration. Charitable remainder trusts require ongoing trust accounting. The question was never "which option is free" — it's "which option has the lowest total cost for your specific numbers," including the parts nobody puts on a brochure.
That's also why the rate environment matters so much right now. A 5.0% 7520 rate makes a GRAT's required hurdle higher — the trust has to outperform 5% before anything transfers tax-free to your beneficiaries. An IDGT sale, by contrast, typically uses the lower mid-term Applicable Federal Rate for the note interest, which usually sits below the 7520 rate. In a rising-rate environment, that spread is exactly what tilts the math — sometimes toward IDGT, sometimes not, depending on how fast you expect the underlying asset to grow. We ran the state-tax-specific version of this trade-off in GRAT vs. IDGT vs. Portability on a $7 Million Estate: Massachusetts, and the mechanics translate directly here — but your state's exemption, your growth assumption, and your asset type will change every number in that table.
The portability trap hiding in plain sight
One more line item people skip because it looks irrelevant when you're under the federal exemption: filing the portability election (Form 706) at the first spouse's death, even when no federal tax is due. It costs a few thousand dollars in accountant time. Skipping it costs nothing today — and potentially a great deal in twenty years if your combined estate grows past whatever the exemption looks like by then, or if the surviving spouse remarries into more assets. That's a hidden cost with a delayed fuse, the same category of risk as an underinsured home that looks fine until a wildfire season redefines "fine." We go deeper on why this decision resists rules of thumb in GRAT, IDGT, or Portability? A 5-Question Decision Framework.
What actually determines your number
None of the four paths above is universally "right." Path A might be genuinely fine for someone with a simple estate, no business interests, and beneficiaries who don't mind probate delays. Path D might be overkill if your assets aren't appreciating fast enough to justify the setup cost. The variables that decide it for you:
- Your state's estate tax exemption and rate structure (some states have none at all)
- Whether you're married and can use portability, or single like this example
- Your actual expected growth rate — 6% is a placeholder, not a forecast
- How much liquidity you have to fund gifting or trust strategies without disrupting your life
- Where the IRS 7520 rate and AFRs sit the week you actually act, since both move monthly
Run your own version of this table with your real state, your real growth assumptions, and this week's actual rates at Voritanel — the same comparison above, built for your numbers instead of an illustrative $6.5 million estate in a hypothetical state.
The Fed isn't done moving rates, mortgage rates aren't done reacting, and the 7520 rate will keep shifting with them. The math above is accurate for this week. It won't be accurate for long — which is exactly why "I'll get to it eventually" is its own line item on the total cost, not a way of avoiding one.
Sources
- Fed Hikes Rate for the First Time Since 2023 — NerdWallet
- Is Your Home Insurance Enough to Weather a Disaster? How to Check — NerdWallet
- I Used Credit Card Rewards to Fund a European Vacation — and It Still Cost a Fortune — NerdWallet
- Can Redditors (and Experts) Help You Spend Less on Groceries? — NerdWallet
- Mortgage Rates Today, Thursday, September 17: Fed Hikes, Rates Over 7% — NerdWallet