IRS Schedule 1 accompanies Form 1040 or 1040-SR to report types of additional income not entered directly on the main form and adjustments that reduce income before itemized or standard deductions.
The schedule has two main parts: Part I flows additional income to Form 1040, and Part II flows adjustments to income. A taxpayer files it only when at least one listed line applies or another form directs an amount there.
Last reviewed: July 30, 2026. This article is for general educational purposes and does not replace advice from a qualified tax, legal, financial, or student-aid professional.
What Is IRS Schedule 1?
Additional-income lines can include business income, capital gain or loss in specified situations, rental and pass-through income, farm income, unemployment compensation, gambling winnings, canceled debt, prizes, awards, and other income.
Adjustments can include certain educator expenses, health savings account deductions, deductible self-employment tax, self-employed retirement and health-insurance deductions, IRA deductions, student-loan interest, alimony under qualifying pre-2019 instruments, and other listed items.
Who Should Use IRS Schedule 1?
- A Form 1040 or 1040-SR filer with income assigned to Schedule 1.
- A sole proprietor carrying net profit or loss from Schedule C.
- A partner, S corporation shareholder, estate or trust beneficiary, or landlord carrying amounts from Schedule E.
- A taxpayer claiming an above-the-line adjustment listed in Part II.
- Not every individual filer; the schedule can be omitted when no line applies.
How to Use or Complete IRS Schedule 1
- Use the Schedule 1 revision for the same tax year as Form 1040.
- Match each income document and supporting schedule to the correct Part I line.
- Complete required source schedules such as C, D, E, or F before transferring their amounts.
- Calculate each Part II adjustment and attach supporting forms such as Form 8889 when required.
- Total Parts I and II and transfer them to the designated Form 1040 lines.
- Reconcile the completed return with Forms W-2, 1099, K-1, records, and IRS transcripts.
Common Schedule 1 Additional Income
- State or local income-tax refunds that are taxable under the tax-benefit rule.
- Business income or loss from Schedule C.
- Rental real estate, royalties, partnership, S corporation, estate, and trust amounts from Schedule E.
- Farm income or loss from Schedule F.
- Unemployment compensation and certain taxable grants.
- Gambling winnings, prizes, awards, canceled debt, jury-duty pay, hobby income, and other income assigned to the schedule.
Common Adjustments to Income
- Eligible educator expenses.
- Health savings account deduction from Form 8889.
- Deductible part of self-employment tax.
- Self-employed SEP, SIMPLE, qualified-plan, and health-insurance deductions.
- IRA deduction and student-loan interest deduction.
- Penalty on early withdrawal of savings and other adjustments specifically listed for the year.
Schedule 1 Versus Other 1040 Schedules
| Schedule | General purpose |
|---|---|
| Schedule 1 | Additional income and adjustments to income. |
| Schedule 2 | Additional taxes. |
| Schedule 3 | Additional credits and payments. |
| Schedule A | Itemized deductions. |
| Schedule C | Sole-proprietor business profit or loss. |
| Schedule E | Rental, royalty, and pass-through income or loss. |
How Schedule 1 Affects AGI
Part I increases or decreases total income. Part II adjustments reduce that total to arrive at adjusted gross income. AGI can affect credit eligibility, deduction limits, income-driven calculations, state returns, and financial-aid information.
An adjustment is different from an itemized deduction. A taxpayer can claim a valid Schedule 1 adjustment and still take the standard deduction.
Before You File or Submit
- Use the current official version. Tax forms, addresses, thresholds, and electronic filing procedures can change. Download the form or instructions from the issuing agency immediately before use.
- Match names and taxpayer identification numbers. Confirm that legal names, SSNs, ITINs, EINs, plan numbers, and tax periods agree with the related return and agency records.
- Gather supporting records first. Keep calculations, statements, notices, authorizations, appraisals, receipts, and other documents that support every entry.
- Check the deadline and delivery method. An extension to file does not necessarily extend the time to pay. Private carriers also may require a different street address than USPS.
- Sign where required. An unsigned paper form, missing consent, or incomplete electronic authentication can delay or invalidate a submission.
- Keep a complete copy. Retain the filed form, attachments, confirmation number, proof of mailing, fax confirmation, and payment record.
Common Mistakes to Avoid
- Using Schedule 1 for a tax year different from the main return.
- Entering gross business receipts instead of Schedule C net profit or loss.
- Double-reporting income already entered directly on Form 1040.
- Claiming an adjustment without meeting its income, coverage, filing-status, or participation limits.
- Omitting a required supporting schedule or form.
- Forgetting that state treatment can differ from the federal adjustment.
What Happens After Submission?
Schedule 1 totals become part of the filed Form 1040 and may be matched with information returns. A mismatch can generate a notice even when the main Form 1040 appears correct.
If an omitted or incorrect item changes tax, credits, or AGI, recompute the complete return and use Form 1040-X when amendment is required.
Processing time is not the same as a legal deadline. Do not submit a duplicate merely because an acknowledgement or response has not arrived. First check the relevant online status tool, confirmation record, or official contact channel. If the agency requests more information, respond by the date and method stated in the notice.
Records to Keep
Keep a copy of the completed submission and all documents used to prepare it. Your file should also contain the tax-year or period involved, the date submitted, the delivery method, any confirmation or tracking number, and notes about later agency correspondence. Retention periods depend on the form and issue, so follow the specific instructions and keep records longer when they may remain material to an audit, refund claim, basis calculation, collection case, election, or amended return.
Frequently Asked Questions
Does everyone file Schedule 1?
No. File it only when a Part I income item, Part II adjustment, or another form instruction requires it.
Is Schedule 1 the same as Schedule A?
No. Schedule 1 reports additional income and above-the-line adjustments; Schedule A reports itemized deductions.
Where does self-employment income go?
Net profit or loss is calculated on Schedule C and then carried to Schedule 1. Self-employment tax is calculated separately on Schedule SE.
Can I claim Schedule 1 adjustments with the standard deduction?
Yes, if eligible. Adjustments to income are computed before the standard or itemized deduction.
Official Resources
Bottom line: Complete source schedules first, distinguish additional income from adjustments, transfer both totals accurately, and use the Schedule 1 version matching the tax year.