Built for CPAs & Individual Taxpayers
OBBBAOne Big Beautiful Bill Act

Schedule 1-A
Calculation Tool

Also known in the news as the One Big Beautiful Bill Act (OBBBA).

Streamline your Schedule 1-A workflow. Calculate Tips, Overtime, Auto Loan Interest, and Senior deductions with a complete audit trail — all in one place.

See Features

By continuing, you acknowledge this tool provides estimates only and all calculations must be verified before filing. Read full disclaimer

JUST LAUNCHEDFour powerful new features
FREE

🛡️ Tax Pre Flight

Screen prospects automatically and filter out wrong-fit clients before they hit your calendar.

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🔄 What-If Scenarios

Compare up to 4 situations side-by-side. See which gives maximum benefit instantly.

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NEW

🧙 Qualification Wizard

Plain-English questions to check FLSA, SSTB, and occupation eligibility.

⏱️ Overtime Optimizer

Compare all 5 IRS methods. See exact dollar difference instantly.

🚗 VIN Verification

Instant US assembly verification using official NHTSA data.

100%
Client Privacy
Full
Audit Trail
IRS
Form Aligned
2025
Tax Year

What is OBBBA?

OBBBA stands for the One Big Beautiful Bill Act. This legislation introduced the new Schedule 1-A deductions for tax year 2025.

If you have heard about "OBBBA deductions" in the news, this calculator is the Schedule 1-A tool that applies those rules to Tips, Overtime, Auto Loan Interest, and Senior deductions.

Built for CPAs
& Individual Taxpayers

Whether you're a tax professional preparing returns for clients or an individual navigating your own Schedule 1-A, our tool provides the accuracy and transparency you need.

  • Line-by-line calculation trace for review
  • Export to PDF and JSON for documentation
  • Real-time validation and eligibility checks
  • Zero client data stored on servers

For CPAs

Efficient client preparation with full documentation support

For Tax Preparers

Quick estimates and eligibility screening for clients

For Enrolled Agents

Verify calculations before finalizing returns

For Individuals

Understand your potential deductions before filing

Schedule 1-A Deductions (OBBBA)

Calculate all four deduction categories with guided inputs and automatic eligibility verification.

Tips

L4-L13Wizard

Up to $25,000 deduction for qualifying tip income. NEW: Qualification wizard helps check SSTB status & occupation eligibility!

Overtime

L14-L21OptimizerFLSA Wizard

Deduct qualifying overtime pay. Method optimizer + FLSA eligibility wizard!

Auto Loan Interest

L22-L30VIN Verified

Up to $10,000 deduction for interest on US-assembled vehicle loans. Now with automatic NHTSA verification!

Seniors

L31-L37

Extra $4,000 deduction for taxpayers aged 65+ with Social Security income.

How It Works

A guided workflow that mirrors the official form, with real-time calculations and validation at each step.

1

Enter Client Info

Start with filing status, MAGI, and basic taxpayer information to establish eligibility baselines.

2

Calculate Deductions

Work through each applicable section with guided inputs. Watch the calculation trace update in real-time.

3

Review & Export

Get a complete summary with line-by-line breakdown. Export to PDF or JSON for your records.

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What-If Scenarios

Compare

Model up to 4 different tax scenarios side-by-side. Change income, toggle deductions, and instantly see which situation gives you the maximum benefit.

4 Scenarios
Best Scenario Badge
$ Difference Shown
Export to PDF
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JUST ADDED

Qualification Wizard

Guided

Don't know what FLSA means? Not sure if your employer is an SSTB? Our step-by-step wizard asks plain-English questions and tells you exactly if you qualify — before you enter any numbers.

FLSA Eligibility
SSTB Determination
Occupation Check
Clear Explanations

Why it matters: Most users get confused by terms like FLSA and SSTB. Our wizard eliminates guesswork with clear yes/no questions.

Overtime Method Optimizer

Pro Feature

Stop guessing which IRS method to use. Enter your pay data once and instantly compare Methods A through F side-by-side. See the exact dollar difference and apply the best one with a single click.

5 Methods Compared
Dollar Savings Shown
Real-Time Calculation
One-Click Apply

Why it matters: Other tax software makes you pick a method blindly. We show you which one saves your client the most money.

NHTSA VIN Verification

Instantly verify if a vehicle qualifies for the Auto Loan Interest deduction. Our tool automatically checks the official NHTSA database to confirm US assembly status — no manual lookup needed.

Official NHTSA Data
Instant Results
Audit Trail Ready
Zero Manual Lookup

How it works: Enter a VIN and get instant eligibility confirmation with make, model, and plant location for your records.

Coming Soon

Roadmap

Tax Saving Estimator

Show clients their potential tax savings in dollars. Compare before/after Schedule 1-A impact on their return.

Multi-Client Mode

Manage multiple client calculations in one session with easy switching and organized exports.

Eligibility Pre-Screener

Quick 5-question screener to identify which deductions a client may qualify for before starting.

Document Checklist

Before starting, see exactly which documents you need — W-2s, loan statements, or Social Security forms based on your deductions.

Notes & Documents

Attach notes and reference documents to each client calculation. Keep everything organized in one place.

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Client Data Stays on Your Device

All calculations happen right in your browser. Client financial data never leaves the device — nothing is transmitted, stored, or logged on any server.

No account required
No data transmission
100% client-side processing
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Professional Responsibility Notice

This tool is designed to assist tax professionals and individuals in calculating Schedule 1-A deductions. It provides estimates based on the information entered and should be used as a starting point for review, not as final tax advice.

Tax professionals are responsible for exercising their own professional judgment and verifying all calculations against the actual tax return before filing. Individual users should consult with a qualified tax professional for guidance specific to their situation.

By using this tool, you acknowledge that:

  • All calculations must be independently verified before being used in any tax filing
  • The preparer of record bears full responsibility for the accuracy of any filed return
  • This tool does not constitute tax advice and we make no guarantees regarding accuracy
  • We assume no liability for errors, omissions, or any consequences of using this tool

Ready to Streamline Your Workflow?

Start calculating Schedule 1-A deductions with a complete audit trail — free for all users.

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