Roth vs Traditional 401(k) — The Real Math After 33 Years

Two men. Same job, same salary, same $1,000 a month into the same fund for 33 years. At 65 their accounts hold exactly the same number — $887,425 each, to the cent. One of them can spend nearly $3,000 a year more than the other, for the rest of his life. The only difference is one checkbox they ticked at 32. Everyone tells you this decision doesn't matter — that if your tax rate is the same now as later, the two accounts are identical. That's true, and it's useless, because it rests on a number almost nobody checks. When you check it, it's wrong twice, in opposite directions. FREE CALCULATOR — the same model used in this video. No email, no signup. Opens a copy straight into your own Google Drive: 👉 https://docs.google.com/spreadsheets/... WHAT WE FOUND • Both 401(k)s end identical: $887,425 • Danny deducts at 22% and pays it back at 5.9% — not 22% • Social Security nearly halves his lead, because a Roth withdrawal is invisible to the provisional-income test • If he doesn't invest the tax saving, Marcus wins by $4,241/year • At the $24,500 max it's a dead heat — $260 apart • Roth doesn't win until a $3.2M balance THE VERDICT 12% bracket → Roth. 22% or higher → Traditional, but only if you actually invest the difference. If you know you won't, go Roth and treat the worse math as the price of a system that works on you. CHAPTERS 0:00 The collision 0:58 Marcus and Danny 1:32 The fair fight 2:36 Real dollars, not nominal 3:25 What each man owns at 65 4:23 The effective rate 5:46 Why it happens 6:49 The turn — Social Security 9:06 The flip 10:38 Maxing it out 11:50 The crossover 12:11 The verdict 12:50 What we left out 13:39 The calculator SOURCES • 2026 federal brackets & standard deduction ($16,100) — IRS Rev. Proc. 2025-32 • 2026 401(k) elective deferral limit ($24,500) — IRS, November 2025 • Social Security provisional-income thresholds ($25,000 / $34,000) — fixed in statute since 1983 and 1993, never indexed WHAT WE LEFT OUT — federal tax only, no state. No required minimum distributions from 73, no Medicare IRMAA surcharges, and no future change in tax rates. The two biggest omissions both hurt the Traditional saver, so the $2,909 figure is if anything generous to him. The 5.9% above is the effective rate before Social Security. With Social Security included it rises to 12.7% — the calculator shows both; set Social Security to 0 to reproduce the video's figure. Not financial advice. Run your own numbers in the calculator. #Roth401k #Traditional401k #RetirementPlanning #PersonalFinance #MoneyTwoWays EVERY EPISODE ON THIS CHANNEL Leasing vs Buying a Car, and the month the lines cross:    • Leasing vs Buying a Car — The Real Math Ov...   New Truck vs Used Truck, the real math over 10 years:    • New Truck vs Used Truck — The Real Math Ov...   15-Year vs 30-Year Mortgage, and the $97,000 nobody quotes:    • 15-Year vs 30-Year Mortgage — The Real Mat...   Social Security at 62 vs 70, and why the break-even age is not 80:    • Social Security at 62 vs 70 — The Break-Ev...   Paying off your mortgage early vs investing the difference:    • Paying Off Your Mortgage Early vs Investin...   Rent vs Buy a House, the real math over 20 years:    • Rent vs Buy a House — The Real Math Over 2...