An exemption calculator used to be one of the simplest parts of filing taxes — multiply $4,050 by the number of people on your return, and that chunk disappeared from your taxable income. A family of four in 2017 claimed $16,200 in personal exemptions. That entire line item dropped to $0 when the Tax Cuts and Jobs Act (TCJA) took effect in 2018. Now, with the TCJA set to expire after December 2025, those exemptions may return in 2026 at an estimated $5,300 per person. Whether you're planning for this year or bracing for next, understanding how exemptions, allowances, and tax-exempt income interact is worth real money.
This calculator compares your federal tax bill across three eras: 2017 (the last year personal exemptions existed), 2025 (current law with no exemptions but higher standard deductions), and projected 2026 (if TCJA sunsets). The article below walks through what changed, who wins or loses under each scenario, and how tax-exempt income slots into the picture.
2017 vs. 2025 vs. 2026: A Side-by-Side Breakdown
The TCJA didn't simply delete exemptions — it restructured the entire deduction-and-credit framework. The standard deduction nearly doubled, the Child Tax Credit doubled from $1,000 to $2,000, and a new $500 Other Dependents Credit appeared. But the trade-offs aren't obvious until you run the numbers for a specific household.
| Provision | 2017 (Pre-TCJA) | 2025 (Current) | 2026 (Est. if Expired) |
|---|---|---|---|
| Personal exemption (per person) | $4,050 | $0 | ~$5,300 |
| Standard deduction (single) | $6,350 | $15,750 | ~$8,350 |
| Standard deduction (MFJ) | $12,700 | $31,500 | ~$16,700 |
| Child Tax Credit (per child <17) | $1,000 | $2,000 | ~$1,000 |
| Other Dependents Credit (17+) | $0 | $500 | $0 |
| Top marginal rate | 39.6% | 37% | 39.6% |
The pattern is clear: Congress replaced per-person exemptions with a larger flat deduction and bigger credits. For a single filer with no dependents, the 2025 standard deduction of $15,750 far exceeds the 2017 combo of $6,350 + $4,050 = $10,400. That's $5,350 more shielded from taxes — worth roughly $1,177 in actual savings at the 22% bracket. But for larger families, the math gets closer.
Worked Example: Family of Four at $120,000
Consider a married couple filing jointly with two children under 17, earning $120,000 in gross income and taking the standard deduction. No other deductions or tax-exempt income. Here's how each era treats them:
Under 2017 Rules
- Standard deduction: $12,700
- Personal exemptions: 4 × $4,050 = $16,200
- Total deductions: $28,900
- Taxable income: $120,000 − $28,900 = $91,100
- Federal tax (2017 brackets): ~$13,584
- Child Tax Credit: 2 × $1,000 = $2,000
- Tax after credits: ~$11,584
Under 2025 Rules (Current Law)
- Standard deduction: $31,500
- Personal exemptions: $0 (suspended by TCJA)
- Total deductions: $31,500
- Taxable income: $120,000 − $31,500 = $88,500
- Federal tax (2025 brackets): ~$10,161
- Child Tax Credit: 2 × $2,000 = $4,000
- Tax after credits: ~$6,161
Under 2026 Rules (If TCJA Expires)
- Standard deduction: ~$16,700
- Personal exemptions: 4 × $5,300 = $21,200
- Total deductions: ~$37,900
- Taxable income: $120,000 − $37,900 = $82,100
- Federal tax (pre-TCJA brackets): ~$12,244
- Child Tax Credit: 2 × $1,000 = $2,000
- Tax after credits: ~$10,244
This family pays $5,423 less under current 2025 law than under 2017 rules. If TCJA expires, their 2026 bill would be about $4,083 higher than 2025 — even with personal exemptions returning. The doubled standard deduction and doubled CTC under TCJA more than offset the loss of exemptions for a four-person household at this income level. But cross $200,000 in income and the gap narrows because exemptions were phased out above certain thresholds anyway (the old “Pease limitation”).
Who Actually Loses Without Personal Exemptions?
Not everyone came out ahead when exemptions disappeared. The households most affected by the TCJA exemption suspension are those with many dependents and moderate income — specifically, families with 5 or more members earning between $75,000 and $150,000.
Here's why. In 2017, a single parent with four children (head of household) claimed 5 × $4,050 = $20,250 in exemptions, plus a $9,350 standard deduction. That's $29,600 in total deductions. Under 2025 rules, the same filer gets a $22,500 standard deduction and $0 in exemptions. The $7,100 gap in deductions costs roughly $1,562 in extra federal tax at the 22% marginal rate. The expanded CTC ($2,000 vs. $1,000 per child) offsets $4,000, but the net benefit shrinks as family size grows. By the time you reach 7 or 8 dependents, the old system was genuinely cheaper.
Use the calculator above with your actual household size. If your tax bracket is 22% or higher and you have 5+ dependents, the 2017 column may show a lower bill. That matters because those same pre-TCJA rules could return in 2026.
Tax-Exempt Income: The Exemption That Didn't Go Away
While personal exemptions vanished, tax-exempt income remains fully intact under both TCJA and pre-TCJA law. This is a separate concept entirely: certain types of income are simply never counted as taxable, regardless of exemptions or deductions. The IRS doesn't tax what it never sees on your return.
Common categories of tax-exempt income include:
- Municipal bond interest — exempt from federal tax and often from state tax if issued in your state. A $50,000 muni bond portfolio yielding 4% generates $2,000/year in completely tax-free income. At a 24% marginal rate, that's $480 in annual federal tax savings.
- Roth IRA and Roth 401(k) distributions — qualified withdrawals after age 59½ are 100% tax-free. A $500,000 Roth balance generating $20,000/year in retirement income saves roughly $4,400 annually at the 22% bracket.
- Certain Social Security benefits — up to 85% can be taxable depending on provisional income, but for lower-income retirees, the full benefit may be exempt. Per IRS Publication 915, a single filer with combined income below $25,000 pays zero federal tax on Social Security.
- Life insurance death benefits — proceeds paid to beneficiaries are generally tax-free under IRC Section 101(a).
- Gifts and inheritances — the recipient doesn't owe income tax on received gifts (though the giver may owe gift tax above the $19,000 annual exclusion for 2025).
Enter your tax-exempt income in the calculator to see exactly how much federal tax it shields. A retiree with $30,000 in Roth distributions and $5,000 in muni bond interest at the 22% bracket saves $7,700 per year compared to receiving the same amount from taxable sources. That's the power of structuring income around tax-exempt vehicles — and it works under any tax regime, TCJA or not.
The 2026 Question: Plan Now or Wait?
Congress has until December 31, 2025, to extend, modify, or let the TCJA expire. As of early 2025, no extension has been signed into law. That creates a planning window. Here are the two scenarios and what each means for exemptions:
If TCJA extends: Personal exemptions stay at $0. The $15,750/$31,500 standard deductions continue (inflation-adjusted). The $2,000 CTC persists. Nothing changes for your exemption strategy — but the standard vs. itemized deduction comparison becomes even more important because the standard deduction keeps growing.
If TCJA expires:Personal exemptions return at an estimated $5,300 per person. The standard deduction drops roughly in half. The CTC falls back to $1,000 per child. For a married couple with three children filing jointly, that's 5 × $5,300 = $26,500 in new exemptions — but they lose about $14,800 in standard deduction ($31,500 − $16,700) and $3,000 in CTC ($6,000 − $3,000). The net deduction change: $26,500 − $14,800 = $11,700 more in deductions, but $3,000 less in dollar-for-dollar credits. At the 22% bracket, $11,700 in additional deductions saves $2,574, but losing $3,000 in credits costs more. This family would pay roughly $426 more under the expired rules.
The break-even point varies by household size. Families with 6+ members tend to benefit from the exemption's return. Families with 1-4 members generally do better under TCJA. Use the calculator's three-era comparison to find exactly where your household lands.
When This Calculator Won't Help
This tool estimates federal income tax only. It doesn't calculate FICA taxes (Social Security at 6.2% on wages up to $176,100 and Medicare at 1.45%), state income taxes, or the Alternative Minimum Tax. If you're subject to AMT, personal exemptions historically had limited value anyway — the AMT exemption amount ($88,100 for single filers in 2025) replaced them. For a complete picture of your total tax burden including FICA, use our effective tax rate calculator.
The 2026 projections are estimates based on inflation-adjusted 2017 figures. Actual 2026 values will depend on Congressional action and IRS inflation adjustments published in late 2025. The taxable income calculatorwill be updated with official 2026 figures once they're released.
High earners should also note that before TCJA, personal exemptions phased out above $261,500 AGI (single) and $313,800 (MFJ) under the “Pease limitation.” If your adjusted gross incomeexceeds those thresholds, exemptions had diminished value even in 2017. The calculator applies the full exemption amount without the phase-out for simplicity — your actual 2017 benefit may have been lower.
