Every Hidden Cost We’ve Calculated
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TheFinSense calculates the exact dollar gap hidden inside every default setting, conventional wisdom, and fine-print fee in your investment accounts. Each number below links to the full analysis with formulas, sources, and sensitivity testing.
All calculations use our documented methodology. Every number is independently verifiable.
| Gap | What It Costs You | Time Frame | Article | ||
|---|---|---|---|---|---|
| $310,817 | The “Shadow Limit” — equal contribution labels hiding unequal after-tax capacity between Roth and Traditional IRA | 30 years | Roth vs Traditional IRA → | ||
| $223,908 | The “Tri-Fold Drag” — execution costs, sweep spreads, and securities lending hidden behind zero-commission branding | 30 years | Zero Commission Broker Hidden Fees → | ||
| $19,725 | The “Settlement Velocity Filter” — cash account buying power drag from bypassing the PDT rule | 10 years | Pattern Day Trader Rule → | ||
| $19,198 | The “Sweep-Spread Filter” — default bank sweep at 0.01% vs money market at 3.30% | 10 years | Brokerage Sweep Account Rates → | ||
| $101,704 | Vesting forfeiture compounds a $7,053 unvested match into a six-figure retirement gap | 28 years | 401k Match Vesting: The $101,704 Cost → | ||
| $492,128 | Custodian cash default on $4,400/yr HSA contributions over 35 years | 35 years | HSA Investment Strategy → | ||
| $50,095 | IRS 10% non-qualified 529 penalty applies to earnings only — tax-deferred compounding erases the one-time cost in 15 years | 25 years | Overfunded 529 Plan: The 10% Trap Most Parents Miss → | ||
| Backdoor Roth IRA Rules: The $112,443 Pro-Rata Trap | $112,443 | 25 years | backdoor roth ira rules | TYPE III-B | April 1, 2026 |
| Mega Backdoor Roth: The $42,100 After-Tax 401(k) Strategy | $809,799 | 27yr | mega backdoor roth | TYPE III-B | 2026-04-02 |
| 2026 Tax Loss Harvesting Rules: The 1.08% Compound Alpha Most Investors Miss | $455,716 | 30yr | tax loss harvesting rules | III-A | 2026-04-05 |
| Investment Policy Statement: The $394,246 Behavioral Alpha Gap | $394,246 | 30yr | investment policy statement | TYPE III-A | 2026-04-06 |
| Asset Allocation Strategy: The 91% Return Driver | $492,980 | 30yr | asset allocation strategy | TYPE III-A | 2026-04-07 |
| Expense Ratio Impact: The 1% Fee That Costs $334,814 | $334,814 | 30yr | expense ratio impact | II | 2026-04-08 | Portfolio Rebalancing Strategy: The 5% Threshold Rule That Saves $68,195 | $68,195 | 30yr | portfolio rebalancing strategy | COST_ANALYSIS | 2026-04-09 |
| Predict Company Bankruptcy: The 42% Screening Error (2026) | $162,330 | 30yr | predict company bankruptcy | III-A | 2026-04-11 |
| $109,616 | Revenue growth ranked first by every screener carries 18.0% DELTA-NOA repricing risk when the accrual component reverts — Richardson et al. tested 108,617 firm-years | 30 years | Revenue Growth Quality: The 18% Accrual Trap → |
How We Calculate
Every gap follows the same structure: two scenarios, identical inputs, one variable changed. The optimized scenario removes the hidden cost. The default scenario keeps it. The difference compounds over time.
Full calculation methodology, assumptions, and limitations: TheFinSense Methodology →
What These Numbers Mean Together
Each article isolates one cost. A real portfolio faces several simultaneously. The sweep spread drains your idle cash. The execution cost shaves your trades. The tax structure reduces your effective contributions. These gaps compound independently and concurrently.
We do not add them together because the interaction effects depend on your specific account structure. But every gap you close stays closed permanently.
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