SwitchWizeSmart financial decisions
New

Car Loan Interest Deduction Calculator 2026 — Your OBBBA Schedule 1-A Tax Savings

The One Big Beautiful Bill Act created a new federal deduction for car loan interest. Estimate your deductible amount after the income phase-out, and see what it actually saves you in tax dollars.

Quick answer: The car loan interest deduction value depends on eligible interest paid, income phase-outs, tax rate, and whether the vehicle and loan qualify. The deduction saves tax, not the full interest amount.

Your Estimated Deductible Amount
$3,200What you can actually deduct after the cap and the phase-out
Your Estimated Deductible Amount
$3,200What you can actually deduct after the cap and the phase-out
Interest Eligible Before Phase-Out
$3,200The deduction is capped at $10,000 of interest per return
Reduction From the Income Phase-Out
$0The cap drops $200 for every $1,000 of MAGI above your threshold
Estimated Federal Tax Savings
$704Deductible amount times your marginal rate — your real dollar benefit
MAGI at Which the Deduction Reaches Zero
$150,000The deduction disappears entirely $50,000 above your threshold
Share of Your Interest the Deduction Offsets
21.99%How much of your car loan interest the tax saving effectively covers
What to do next

Compare Auto Loan Rates

Your action plan
  1. 1

    Calculate the baseline result with your current numbers

    Estimate your federal tax savings from the new OBBBA car loan interest deduction, including the income phase-out and your real dollar benefit.

  2. 2

    Pressure-test one alternate scenario before deciding

    Assumptions change the answer, especially when rates, taxes, or timing matter.

  3. 3

    Use the linked guide or product page for the next step

    Turn the result into a prioritized action instead of treating it as a one-off number.

Compare Auto Loan Rates

This is an educational estimate, not tax, legal, investment, or lending advice. Tax rules, rates, and eligibility change and depend on your full situation. Confirm with a qualified professional or the provider before acting.

Calculator action path

Turn this result into a decision

Every SwitchWize calculator connects to a product comparison, rate context, guidance, alerts, and Money Map.

Rate authority hub
Compare
Compare Auto Loan RatesMove from calculation to current product options.
Rate Trend
Track personal loansUse market context before you decide when to act.
Guide
How to Get a Car Loan: Rates, Requirements, and Where to ApplyAuto loan rates vary by 3–5 percentage points depending on where you borrow. Here's how credit score affects your rate, where to get the best terms, and how to avoid dealer financing traps.
Money Map
Add this scenario to Money MapTurn the result into a saved opportunity or plan item.
Alert
Create a rate alertWatch the market instead of checking manually.
Top auto loan rates

Reviewed Jul 6, 2026 · Methodology

See all →
Navy Federal CU
Checked Jul 6, 2026
3.89%APR
Get Rate

Advertising disclosure: SwitchWize may earn a referral fee if you open an account through a link above. This does not affect our rankings. Ranked using the SwitchWize methodology. Learn more

Frequently Asked Questions

Everything you need to know.

Is car loan interest tax deductible in 2026?
Yes, for tax years 2025 through 2028, under a new provision of the One Big Beautiful Bill Act. Eligible taxpayers can deduct up to $10,000 of interest on a qualifying car loan, claimed on IRS Schedule 1-A. It is available whether you take the standard deduction or itemize. The deduction sunsets after 2028 unless Congress extends it.
Which cars qualify for the car loan interest deduction?
The vehicle must be new — used vehicles do not qualify — and must have final assembly in the United States, which you can confirm by the VIN or window sticker. The loan must be secured by the vehicle and must have originated after December 31, 2024. Leases and refinanced pre-2025 loans do not qualify.
How does the income phase-out work?
The $10,000 cap is reduced by $200 for every $1,000 of modified adjusted gross income above $100,000 for single filers, or $200,000 for married filing jointly. The deduction reaches zero $50,000 above the threshold — so $150,000 MAGI for single filers and $250,000 for joint filers. Married filing separately is generally disqualified.
How much will the car loan interest deduction actually save me?
Your saving is the deductible amount times your marginal federal tax rate, not the deduction itself. For example, a $4,000 deductible amount at a 22% marginal rate saves $880 in federal tax. The calculator computes this directly so you see the real dollar benefit, not just the deduction size.
How do I claim the car loan interest deduction?
You claim it on IRS Schedule 1-A, attached to your Form 1040. Your lender will send a Form 1098 showing the interest you paid if it was $600 or more. You also report the vehicle identification number each year you claim it. The IRS regulations were still proposed as of early 2026 — confirm current rules with a tax professional.
Is the Car Loan Interest Deduction Calculator 2026 — Your OBBBA Schedule 1-A Tax Savings free to use?
Yes. SwitchWize calculators are free, and you do not need an account to run scenarios or view the result.
Does using the Car Loan Interest Deduction Calculator 2026 — Your OBBBA Schedule 1-A Tax Savings affect my credit score?
No. Using a calculator does not trigger a credit check. A credit impact can occur only if you apply directly with a lender, card issuer, or provider.
Are the results personalized financial advice?
No. Calculator outputs are educational estimates based on the inputs you enter. Review assumptions and confirm terms directly with providers before making a financial decision.
What should I do after seeing the result?
Use the recommendation module on this page to compare auto loan rates, or run Money Map to compare this loans & credit decision with your other opportunities.
How does SwitchWize choose related offers?
Related offers are matched by the calculator surface (auto) and ranked using SwitchWize data such as rate, fees, trust signals, product fit, and switching friction. Paid relationships do not change organic ranking order.
How fresh are the rates and offers shown?
Rate and offer data is reviewed on a recurring cadence and every offer module shows review context or links to the methodology and disclosure pages.
Where can I see the ranking methodology?
The SwitchWize methodology page explains how rate freshness, editorial review, affiliate disclosure, and category ranking factors work.
Can Money Map use this result?
Yes. Money Map is the broader diagnostic path: it compares savings, mortgage, cards, and debt so you can see whether this calculator result is your highest-impact next move.

Why This Matters

For decades, interest on a personal car loan was never deductible. The OBBBA changed that for tax years 2025 through 2028: eligible buyers can deduct up to $10,000 of car loan interest a year, and it is an above-the-line deduction — you get it whether or not you itemize. But the rules are narrow. The vehicle must be new, have final assembly in the United States, and be bought with a loan that originated after December 31, 2024. The deduction phases out by $200 for every $1,000 of income above $100,000 (single) or $200,000 (married filing jointly), disappearing entirely $50,000 above that. Many buyers assume they get the full $10,000 and are surprised — this calculator shows your real number.

How to Use It

  1. 1Enter the car loan interest you paid this year — from Form 1098, interest only
  2. 2Enter your modified adjusted gross income (MAGI)
  3. 3Choose your filing status to set the correct phase-out threshold
  4. 4Enter your marginal federal tax rate
  5. 5See your deductible amount after the phase-out and the dollar tax savings
Related calculators
Auto Loan Payment and Affordability PlannerOBBBA Tax Impact Calculator 2026Tax Bracket Calculator
Compare Auto Loan Rates