The $1 Million Retirement Number Is Lying to You: 2026 Social Security Tax Rules Explained

GM.

Quick math problem to start your morning.

You're 70. You're retired. You need $1,000 from your IRA to fix the roof.

You're in the 22% tax bracket. So the $1,000 costs you $220 in tax, right?

Nope. It costs you $407.

You didn't change brackets. You didn't get rich overnight. The IRS didn't make a mistake. You just walked into something financial planners call the tax torpedo — and roughly half of all Social Security recipients are standing in its blast radius right now without knowing it.

Today we're going to explain exactly how a rule Congress wrote in 1983 quietly turned into a 40% tax on middle-class retirees, why the "$1 million retirement number" is lying to you, and the five moves that defuse the whole thing.

Grab coffee. This one's worth the read. ☕

You've heard it a thousand times. Save a million. Retire. Done.

Let's actually run it.

You hit 65 with exactly $1,000,000. Morningstar's latest research says the safe starting withdrawal rate is 3.9% — not 4%, and definitely not 6%.

Add the average Social Security check, which after the 2.8% COLA is $2,071/month in 2026.

Sixty-four grand.

That's the millionaire retirement. Before taxes. Before Medicare. Before your state gets a turn.

It's a fine income! It is not remotely what people picture when someone says "I retired with a million dollars." 💀

But here's the actual point. Two people can have the identical $1,000,000 and land in completely different universes:

Same balance. Same market returns. Mark is in trouble and Dana isn't.

Nothing about that gap is an investing problem. It's housing, spending, and account structure — none of which fit on a brochure that says "$1 MILLION."

Your retirement number isn't a number. It's a relationship. Moving on. 👇

Most people think one of two things about Social Security taxes. Either "it's not taxed, I already paid in" or "it's taxed like a paycheck."

Both wrong. The truth is weirder and more expensive.

The IRS doesn't use your AGI here. It invented a separate number just for this:

Two things should make you sit up.

☠️ Municipal bond interest counts. The one thing sold to retirees as "tax-free" is written into this formula by name. It doesn't save you here.

☠️ Half your benefit counts against itself. Your Social Security helps decide how much of your Social Security gets taxed. Beautiful stuff.

Then the thresholds:

Now the part that turns a rule into a trap.

Those numbers are not indexed to inflation. The Congressional Research Service says it in one flat sentence: "None of the thresholds is indexed for inflation or wage growth."

$25,000 was set in 1983. It is still $25,000 today.

Watch what that does over time:

A rule built to tax the richest ~10% of retirees now hits the majority of them.

Nobody voted for that. It happens automatically. Every single year. By doing nothing.

That's the trap. Congress didn't raise your taxes — it just stopped moving the goalposts and let inflation do the work. 🎯

Here's the mechanism, and it's brutal in its simplicity.

In the danger zone, every extra $1 you withdraw does two things:

So $1 out of the IRA = $1.85 of taxable income.

Your real rate = your bracket × 1.85.

Look at that 12% row one more time.

A retiree in the lowest real bracket in the entire tax code can pay 49.95% on the margin.

Higher than the 37% top bracket. Higher than what a billionaire pays on ordinary income. From the 12% bracket. 🫠

Single. 70. Widowed. $34,000/yr from Social Security. Takes $46,000/yr from her IRA. Solidly middle class. Not doing anything fancy.

Her roof leaks.

She takes one extra $1,000.

The $1,000 turned into $1,850 of taxable income. At 22%, that's $407.

To actually net $1,000 for the roof, Margaret has to withdraw about $1,686.

She has no idea. Her tax software won't flag it. Her bracket on the return says 22%. 🤷

The torpedo is a hump, not a cliff. And humps have a far side.

Once 85% of your benefit is already taxable, that's the ceiling — the law caps it at 85%, forever. More withdrawals can't make more of it taxable. Your rate snaps back to normal.

Which leads to the most counterintuitive sentence in this newsletter:

Creeping through the hump at 40.7% year after year after year is worse than blasting through it in two or three concentrated years and living off Roth/cash in between.

Which is the exact opposite of the standard advice everyone gives you ("take a little each year, stay in a low bracket!").

Bookmark that one. 🔖

If the torpedo is a hump, IRMAA is a cliff. And it bills you in the past.

IRMAA = the Medicare surcharge for higher-income retirees. Your 2026 premium is set by your 2024 tax return. Two-year lookback. Whatever you did in 2024, you're paying for it right now.

(Extra per year includes the Part D surcharge, which rides along with each tier.)

Three reasons this one hurts more than it looks:

1. It's a step, not a ramp. One dollar over $109,000 costs you $1,148.40. For one dollar. That's an effective marginal rate of 114,840%. We're not exaggerating for effect — that's the actual arithmetic. 🪜

2. Couples pay it twice. Both on Medicare, both surcharged. Double every number above.

3. What triggers it is usually something smart you did on purpose. A Roth conversion. Selling the rental. A big capital gain. Or the classic: deferring your first RMD to April 1 and accidentally taking two RMDs in one tax year.

And the kicker — you can appeal IRMAA with Form SSA-44, but only for a "life-changing event": marriage, divorce, death of a spouse, retirement, losing a pension.

A Roth conversion is not on the list. Neither is a capital gain.

The exact things most likely to push you over the line are the exact things you can't appeal. Chef's kiss. 👨‍🍳💋

Both traps run on the same fuel: taxable income in retirement.

Which means the lever isn't returns. It's where the dollars live.

Two rows to stare at:

Munis. Sold as tax-free. Explicitly written into the provisional income formula. They save you on ordinary income tax and nothing else. If you own them specifically as a retiree "tax play," go check your math. 🧾

QCDs. Starting at age 70½ you can send up to $111,000/yr straight from your IRA to charity. It satisfies your RMD, never touches your AGI, and dodges the torpedo and IRMAA and your bracket in one move.

Note the age. 70½ — that's 2½ years before RMDs even start. If you give to charity at all, this is the cleanest tool in the entire tax code and almost nobody uses it early. 🎁

There's a stretch in most retirements where your taxable income is the lowest it will ever be again.

From the day the paycheck stops → to the day Social Security and RMDs turn on.

Call them the gap years. Usually 65 to 73. Sometimes 62 to 70.

In that window you can:

Every dollar you move out of a traditional account during the gap years is a dollar that can never torpedo you, never trigger IRMAA, and never get forced out by an RMD.

And every year you skip is gone forever. You cannot go back in 2035 and use the empty 12% bracket you had in 2027.

Which is why "I'll deal with taxes when RMDs start" is one of the most expensive sentences in personal finance. By the time you have to deal with it, the cheap years are behind you. 🚪

Everything above assumes you decide when money comes out.

At 73, the government decides. 🫡

Three notes:

The percentage climbs forever. At 90 you're forced out of 8.2% whether markets are up, down, or on fire.

The "April 1 grace period" is a trap. Defer your first RMD and you take two in one tax year — about $75,000 on a $1M balance. That's a bracket spike, a torpedo, and an IRMAA bomb that lands two years later. It's optional. Using it is usually a mistake. ⚠️

Age goes to 75 in 2033 for people born 1960+. If you were born in 1959, there's a genuine drafting glitch in SECURE 2.0 and your age is ambiguous. Go get that confirmed — don't assume.

Save this section. It's every number you need in one place.

Also: about 20% of Social Security recipients are under 65 and get exactly $0 from it.

That 60–63 super catch-up is the sleeper. It only exists in the four calendar years you're 60, 61, 62 and 63. At 64 it drops back to $8,000. It's the last big tax-deferral window most people ever get, and it lands right when income usually peaks. 🪟

Heads up for high earners: if your prior-year wages from the same employer topped $150,000, your catch-up must now be Roth. The transition period ended Dec 31, 2025 — check how your plan is handling 2026.

Full retirement age is 67 if you were born 1960 or later. Claim at 62 and you lose 25–30%, permanently. Wait past FRA and you gain 8%/year up to 70.

And then it stops. Zero benefit to waiting past your 70th birthday. Every month after that is pure loss. Set a calendar reminder. ⏰

That Part D cap is the genuinely great news in this whole email. A hard annual ceiling on prescription costs. It killed the single most catastrophic uncapped expense in Medicare.

Original Medicare still has no overall out-of-pocket max though. That's what Medigap and Advantage plans are for. "Medicare covers it" is not a plan. 🏥

Stop asking "how much do I need?"

Ask: "how much do I need my investments to produce each year, for how long, after tax?"

Then run it as a gap:

Same lifestyle. $410,000 difference in required savings.

Created by one decision, made on one afternoon, about one form. 📝

That's why $1 million is simultaneously useful and useless. Useful as a benchmark. Useless as a destination. It's a result of the plan — never the plan.

Keep your provisional income out of the phase-in zone when you can. Blast through it fast when you can't. Use the gap years. Stay under your IRMAA step. Hold enough cash that one bad year doesn't force one bad sale.

Do that, and $800,000 beats $1.5 million.

Skip it, and you'll spend your 70s finding out that a rule from 1983 — never once updated — is taking 40 cents of every dollar you thought was yours.

The goal was never a number on a statement.

It's waking up at 85 and still having choices. 🫶

See you next week.

— Penny Brief

Social Security taxation
IRS Topic 423 · IRS Pub 915 · SSA Benefits Planner: taxes · SSA history of benefit taxation · SSA Issue Paper 2015-02 · CRS RL32552 · CRS R48613

2026 tax numbers
IRS 2026 inflation adjustments · Rev. Proc. 2025-32 · IRS senior deduction eligibility · Schedule 1-A

Accounts & RMDs
IRS 2026 contribution limits · Notice 2025-67 · IRS RMD rules · Pub 590-B · Roth catch-up final regs

Social Security & Medicare
SSA 2026 COLA fact sheet · SSA early/delayed retirement · SSA full retirement age · CMS 2026 Part A & B · CMS Part D redesign · Form SSA-44 · SSA: lower your IRMAA