OBBB vs Traditional Tax Rules
See exactly how the One Big Beautiful Bill Act changed the tax code for tips, overtime, car loans, and seniors — and what happens when it sunsets in 2028.
Our tax specialists analyzed every provision of the One Big Beautiful Bill Act against the pre-2025 tax code so you can see exactly what changed, who benefits, and how much you could save.
What are the biggest differences between OBBB and old tax rules?
Before OBBB (2024), tips and overtime were fully taxable, car loan interest on personal vehicles was not deductible, and seniors received only a small standard deduction bump. After OBBB (2025), eligible taxpayers can deduct up to $25,000 in tips, $12,500 in overtime premium ($25,000 if married filing jointly), $10,000 in car loan interest, and $6,000–$12,000 as a senior deduction — all below-the-line. All provisions sunset after 2028.
- •Tips: Old rules = fully taxable; OBBB = up to $25K deductible
- •Overtime: Old rules = fully taxable; OBBB = premium portion up to $12.5K deductible ($25K MFJ)
- •Car Loan: Old rules = not deductible; OBBB = up to $10K for US-assembled
- •Senior: Old rules = ~$1,950 single / $1,550 per spouse std ded bump; OBBB = age add-on continues + $6K/$12K below-the-line
- •All OBBB deductions expire after 2028 unless extended by Congress
The OBBB Act represents the most significant tax-code shift for working- and middle-class filers since the 2017 TCJA. But it's temporary — everything sunsets in 2028. Understanding the old rules versus the new rules helps you maximize deductions while they exist and plan for their potential expiration.
Real-world scenario
Restaurant server, 28, $38K tips + $22K wages, single
Under old rules: all $38K in tips is taxable federal income. Under OBBB: $25K of tips is deductible, leaving only $13K taxable. At 12% marginal rate, that's $3,000 less federal tax. Over 4 years (2025–2028), that's $12,000 in savings that vanish if Congress doesn't extend the provision.
The part most people miss
The biggest 'gotcha' is assuming these deductions are permanent. They are not. If you base long-term financial planning on OBBB deductions continuing past 2028, you could be in for a shock. Treat them as a temporary windfall, not a permanent tax-code feature.
Tips: Old Rules vs OBBB
For decades, tipped workers paid federal income tax on every dollar of tip income. The OBBB Act changed that — but only temporarily.
Tips Taxation: Before vs After OBBBOne Big Beautiful Bill Act
| Feature | Before OBBB (2024) | After OBBB (2025) | |
|---|---|---|---|
| Maximum deduction | $0 | $25,000 | |
| Deduction type | N/A | Below-the-line (Schedule 1-A) | |
| Income phase-out start | N/A | $150K single / $300K MFJ | |
| FICA tax reduction | |||
| Available to self-employed | N/A | Yes (up to the business's net income; SSTB rule on hold under Notice 2025-69) | |
| Reporting form | W-2 Box 7 | W-2 (box 7 for 2025; box 12 code TP from 2026), Form 1099 or Form 4137 → Schedule 1-A |
Under Old Rules (Pre-2025)
All tip income reported on W-2 Box 7 was fully taxable. A server earning $40,000 in tips paid federal income tax on the full amount, plus FICA. The only 'deduction' was keeping meticulous records to prove cash tips — which was a reporting requirement, not a tax break.
Under OBBB (2025–2028)
Up to $25,000 of tip income is now a below-the-line deduction. That same server deducts $25,000, leaving only $15,000 taxable. At 12% marginal, that's $3,000 saved. The deduction phases out starting at $150K single / $300K MFJ.
Overtime: Old Rules vs OBBB
Before OBBB, overtime premium pay was taxed identically to regular wages. The new law creates a deduction for the premium portion — but only for W-2 employees.
Overtime Taxation: Before vs After OBBBOne Big Beautiful Bill Act
| Feature | Before OBBB (2024) | After OBBB (2025) | |
|---|---|---|---|
| Maximum deduction | $0 | $12,500 ($25,000 MFJ) | |
| What qualifies | N/A | Premium portion only (above regular rate) | |
| Deduction type | N/A | Below-the-line (Schedule 1-A) | |
| Income phase-out start | N/A | $150K single / $300K MFJ | |
| Self-employed eligible | N/A | ||
| FICA tax reduction |
Under Old Rules (Pre-2025)
If you earned $20/hour regular and $30/hour overtime (time-and-a-half), every dollar of that $30 was fully taxable. There was no distinction between regular and premium pay for federal income tax purposes.
Under OBBB (2025–2028)
The premium portion — the $10/hour above your regular rate — is now deductible up to $12,500 a year ($25,000 on a joint return). If you work 1,000 overtime hours at $10 premium, that's $10,000 deductible. Only W-2 employees qualify; self-employed workers are ineligible.
Car Loan Interest: Old Rules vs OBBB
Personal vehicle loan interest hasn't been deductible since the Tax Reform Act of 1986 phased out the personal-interest deduction (fully gone from 1991). The OBBB Act created a new deduction for it for 2025–2028 — but with strict US-assembly requirements.
Car Loan Interest: Before vs After OBBBOne Big Beautiful Bill Act
| Feature | Before OBBB (2024) | After OBBB (2025) | |
|---|---|---|---|
| Maximum deduction | $0 | $10,000 | |
| Vehicle requirement | N/A | US-assembled only | |
| Deduction type | N/A | Below-the-line (Schedule 1-A) | |
| Income phase-out start | N/A | $100K single / $200K MFJ | |
| Business use required | N/A | ||
| Must itemize |
Under Old Rules (2018–2024)
Personal car loan interest was not deductible at all (and hadn't been since 1991, when the 1986 personal-interest phase-out finished). The only vehicle-related deductions were for business use (Schedule C) or medical transportation (itemized). Buying a personal vehicle with a loan provided zero tax benefit.
Under OBBB (2025–2028)
Interest on loans for US-assembled vehicles is now deductible up to $10,000 annually, regardless of whether you itemize. You must verify US assembly (VIN starts with 1, 4, or 5, or use NHTSA lookup). The deduction phases out at $100K single / $200K MFJ.
Senior Deduction: Old Rules vs OBBB
Before OBBB, the only extra tax benefit for seniors was a slightly larger standard deduction. The OBBB Act created a substantial new below-the-line deduction that dwarfs the old benefit.
Senior Tax Benefits: Before vs After OBBBOne Big Beautiful Bill Act
| Feature | Before OBBB (2024) | After OBBB (2025) | |
|---|---|---|---|
| Maximum deduction (single) | $1,950 (std ded bump) | $6,000 + the $2,000 age add-on (2025) | |
| Maximum deduction (MFJ) | $3,100 (std ded bump) | $12,000 + $1,600 per spouse (2025) | |
| Deduction type | Higher standard deduction | Age add-on (unchanged) + new Schedule 1-A deduction | |
| Income phase-out start | N/A | $75K single / $150K MFJ | |
| Age requirement | 65+ by year-end | 65+ by year-end | |
| Can stack with std deduction |
Under Old Rules (Pre-2025)
Taxpayers 65+ received an additional $1,950 (single or head of household) or $1,550 per spouse (married) added to their standard deduction in 2024. For a married couple both 65+, that meant an extra $3,100 on top of the regular standard deduction. This was helpful but modest.
Under OBBB (2025–2028)
A new below-the-line deduction of up to $6,000 per eligible person ($12,000 if both spouses qualify on a joint return) is added on top of the existing age-65 standard-deduction add-on, which continues ($2,000 single/HOH or $1,600 per married spouse for 2025; $2,050 / $1,650 for 2026). It's available whether or not you itemize and phases out starting at $75K single / $150K MFJ modified AGI.
The 2028 Sunset: What Happens When OBBB Expires
Unless Congress acts, all OBBB deductions disappear after December 31, 2028. On January 1, 2029, the tax code reverts to pre-OBBB rules: tips fully taxable, overtime fully taxable, no car loan interest deduction, and seniors return to the modest standard deduction bump.
If NOT extended:
- All four deductions vanish
- Tax code reverts to 2024 rules
- No grandfathering for existing loans
- Plan for higher tax liability in 2029+
If extended:
- Deductions continue as written
- Phase-outs likely remain
- Congress may adjust dollar amounts
- Watch for inflation indexing
Related OBBB Calculators2025
Related OBBB Guides2025
Sources & References
Primary references used for this content
One Big Beautiful Bill Act
Statutory text for the 2025-2028 deductions
View on congress.gov
2026 Inflation Adjustments
Official 2026 brackets, deductions, and thresholds
View on irs.gov
Taxable income defined
Standard deduction and the below-the-line deduction list
View on law.cornell.edu
✓3 primary sources; links re-checked on a weekly rotation by the source watcher