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IRS Schedule A (Form 1040) 2015 — Itemized Deductions Guide
Download the official 2015 Schedule A, learn which expenses qualify, and file accurately—whether completing an original return, an amended return, or correcting a past filing.
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What Is This Form
Schedule A (Form 1040) is the IRS schedule that taxpayers use to itemize deductions instead of taking the standard deduction. For the 2015 tax year, listing eligible expenses can reduce taxable income — but only when total deductible costs exceed the standard deduction for your filing status.
Late Filers
Taxpayers who missed the April 15, 2015, deadline can still attach a completed Schedule A to a late-filed Form 1040 or Form 1040-X.
Multiple Income Sources
Taxpayers with wages, self-employment income, or dividend income often have higher deductible expenses, making itemizing more beneficial than claiming the standard deduction.
Itemizing Deductions
Schedule A is the schedule used to claim personal itemized deductions — such as medical bills, state and local taxes, and mortgage interest — instead of the standard deduction.
Claiming 2015 Credits
Certain Schedule A entries interact with adjusted gross income thresholds that affect 2015 credits, so accurate deduction figures help determine your final refund or balance due.
IRS Compliance
Filing Schedule A with properly documented records creates a clear audit trail that supports your deductions if the IRS questions your return or issues a notice.
Citizens Abroad / Military
U.S. citizens abroad and active-duty military members who itemize complete Schedule A using the same categories, though special extension and combat-zone rules may apply.
Eligibility
Schedule A applies to any taxpayer whose deductible expenses exceeded the standard deduction for their 2015 filing status, including late filers and those reconstructing records to establish a compliance history with the IRS.
Late Filers
Anyone who missed the April 15, 2015, deadline or filed without itemizing may still file Form 1040 or amend using Form 1040-X.
Multiple Income Sources
Taxpayers reporting wages, dividends, or rental income on Schedule E often accumulate enough deductible expenses to make itemizing more beneficial than the standard deduction.
Itemizing Deductions
Use Schedule A if your medical costs, mortgage interest, state and local taxes, or charitable contributions combined exceed your standard deduction amount.
Claiming 2015 Credits
Taxpayers qualifying for AGI-based credits should complete Schedule A carefully, since itemized deduction totals can affect AGI-related calculations elsewhere on the return.
IRS Compliance
Taxpayers who received an IRS notice questioning 2015 deductions use Schedule A to document each eligible expense with proper supporting records.
Citizens Abroad / Military
U.S. citizens abroad and active-duty military receive filing extensions under IRC §7508, but Schedule A deduction categories remain the same as domestic filers.
Step-by-Step
Follow these steps to complete your 2015 Schedule A and attach it to Form 1040. Some thresholds and rules apply specifically to tax year 2015.
Step 1: Gather Your Documents Before Starting
Before filling in a single line, gather all records needed to support every deduction category. This includes Form 1098 for mortgage interest, medical receipts, charitable contribution acknowledgment letters, and all state and local tax payment records.
Step 2: Confirm Your Filing Status
Your filing status determines your standard deduction amount and affects AGI thresholds on Schedule A. The five statuses for 2015 were single, married filing jointly, married filing separately, head of household, and qualifying widow(er) with dependent child. When a spouse itemizes on a separate return, the other spouse cannot claim the standard deduction—both must use the same method.
Step 3: Report All Income on the Correct Lines
Ensure Form 1040 correctly reports all income before completing Schedule A, since itemized deductions are calculated against your AGI. Key lines include wages (Line 7), dividends (Line 9a), capital gains (Line 13), IRA distributions (Line 15a), business and rental income (Line 17), and unemployment compensation (Line 19), fully taxable for 2015.
Step 4: Calculate Your Adjusted Gross Income (AGI)
AGI is calculated on Form 1040 before you complete Schedule A and directly controls how much of certain expenses you can deduct. Above-the-line adjustments such as student loan interest, IRA contributions, educator expenses, and self-employment tax reduce your gross income to arrive at AGI.
Step 5: Choose Your Deductions and Apply Any Limitations
Compare total itemized deductions to your filing status's standard deduction—whichever is larger reduces taxable income more. The 2015 standard deduction was $6,300 (single/MFS), $9,250 (head of household), and $12,600 (MFJ). The Pease limitation reduced itemized deductions for filers whose AGI exceeded thresholds ranging from $154,950 to $309,900.
Step 6: Claim the 2015 Itemized Deduction Categories
Enter eligible expenses in each Schedule A section: medical costs on Lines 1–4, taxes paid on Lines 5–9, mortgage interest on Lines 10–15, charitable contributions, and miscellaneous deductions. Miscellaneous expenses must exceed 2% of AGI before any amount is deductible.
Filing Deadline — April 18, 2016
The original due date for 2015 federal returns was April 18, 2016. This was shifted because Emancipation Day fell on April 15 in Washington, D.C. Taxpayers who filed Form 4868 had until October 17, 2016. Any unpaid balance has been accruing interest and failure-to-pay penalties since the original deadline.
Refund Deadline — Expired April 15, 2019
Under the IRS three-year rule, the window to claim a 2015 refund closed April 15, 2019. Taxpayers who filed Form 4868 may have had until October 17, 2019, to file. Refunds not claimed within the window are forfeited to the U.S. Treasury—consult a tax professional if you believe a refund may still apply.
Processing Time — Paper-Only Filing
Tax year 2015 returns can no longer be electronically filed—e-file generally supports only the current and two prior years—and must be mailed to the IRS. Processing times for older paper returns vary and may take many months. If you owe additional tax, submit payments promptly to limit further interest accrual.
Amended Return Rules
If you filed a 2015 original return without Schedule A, you may amend it using Form 1040-X to add eligible itemized deductions. Each tax year requires its own separate Form 1040-X — years cannot be combined. Note that if your amendment generates a refund, the three-year claim window has already closed.
Missing W-2s or tax records for 2015?
Late filers frequently find that employers or financial institutions no longer retain 2015 records. The IRS and Social Security Administration maintain official records that help you reconstruct your return without estimating income or deduction figures.
IRS Wage & Income Transcript
This type of transcript contains all income reported to the IRS under your Social Security number for 2015, including W-2 wages, 1099 income, and mortgage interest.
IRS Account Transcript
This transcript shows your 2015 account activity, which includes payments made, penalties assessed, credits applied, and any return data the IRS currently has on file.
Social Security Administration
SSA earnings records show Social Security-taxable wages reported by your 2015 employers and can supplement IRS records when original W-2 documents are no longer available.
Contact Prior Employers
The IRS requires employers to retain employment tax records for at least four years—your 2015 employer may still have W-2 details available upon written request.
Do not estimate income figures when reconstructing a 2015 return. Use IRS transcripts and official records to match reported figures exactly.
Missing W-2s or Tax Records?
You can still complete your return even without original records
If your 2015 Schedule A and Form 1040 show a balance due, penalties and interest have been accruing since April 18, 2016. Filing now stops further failure-to-file accruals and begins resolving your account.
Failure-to-File Penalty
(5% per month, up to 25%)
This penalty applies to the unpaid tax balance for each month your 2015 return remained unfiled, capping at 25% of the unpaid amount. For 2015 returns, this penalty has long since reached its maximum.
Failure-to-Pay Penalty
(0.5% per month + interest)
This charge accrues monthly on any unpaid 2015 tax debt, along with IRS interest, set quarterly at the federal short-term rate plus 3%, compounded daily. Even partial IRS payment plans decrease the balance subject to this ongoing penalty.
Penalty Abatement Options
(First-Time Abatement & Reasonable Cause)
First-Time Abatement is available if you have no penalties in the prior 3 years, all returns are filed, and any tax due is paid or arranged for payment. Reasonable Cause relief is also available for qualifying circumstances.
Filing your 2015 return now is still better than waiting. The failure-to-pay penalty and interest continue accruing on any unpaid balance until it is paid in full.
These are the most frequent errors causing IRS processing delays, correspondence, or missed deductions on 2015 Schedule A filings.
- Using the wrong tax year form: Submitting the wrong tax year Schedule A may cause processing delays, IRS correspondence, or disallowed deductions. Always match the form revision to the tax year.
- Skipping the Pease limitations worksheet: Taxpayers above the 2015 Pease threshold must reduce total itemized deductions; skipping this step overstates deductions and may invite an IRS audit.
- Wrong filing status label: An incorrect filing status changes your standard deduction, AGI thresholds, and PEASE threshold—verify your status carefully, especially if your situation changed during 2015.
- Applying Pease limitations incorrectly: Using the wrong adjusted gross income figure or applying the Married Filing Separately threshold ($154,950) to a different filing status produces an incorrect Schedule A total.
- Misreporting unemployment compensation: Unemployment compensation reporting has been fully taxable since 1987 (except for a one-time partial exclusion in 2009); underreporting it distorts AGI and AGI-based deduction limits.
- Assuming a refund is still available: The three-year window to claim a 2015 refund closed April 15, 2019. Filing now establishes compliance, but the IRS will not pay expired refund claims.
- Missing or incorrect Social Security numbers: An SSN error on Schedule A or Form 1040 causes processing delays or IRS correspondence while the discrepancy is investigated and resolved.
- Unsigned return: A paper 2015 return without a signature is not considered filed. On a joint return, both spouses must sign before the IRS will process it.
- Missing attachments: Schedule A must be attached to Form 1040 when mailed. Noncash charitable contributions exceeding $500 also require Form 8283 to support those deductions.
What is IRS Schedule A (Form 1040) for the 2015 tax year used for?
Schedule A (Form 1040) for 2015 lets taxpayers itemize deductions—medical expenses, mortgage interest, state and local taxes, and charitable contributions—instead of claiming the standard deduction. Schedule A total transfers to Form 1040 and reduces taxable income, which determines your final federal income tax liability or refund.
Can I still file a 2015 tax return with Schedule A?
Yes, the IRS accepts late tax returns for prior years, and there is no statutory cutoff for filing a return on which you owe a balance—only for claiming a refund. Filing now with a completed Schedule A begins resolving your 2015 account and stops any remaining failure-to-file accrual on your IRS record.
What is the difference between the standard deduction and itemizing on Schedule A for 2015?
The 2015 standard deduction was $6,300 for single or married filing separately; $12,600 for married filing jointly or qualifying widow(er); and $9,250 for head of household. Additional amounts apply to taxpayers age 65 or older or blind. Itemize only if expenses exceed your standard deduction.
Can I amend my original return to add Schedule A if I took the standard deduction for 2015?
Yes, file Form 1040-X to amend your 2015 original return and attach a completed Schedule A with supporting records. Note that if your amended return generates a refund, the three-year claim window closed April 15, 2019—the IRS will generally not pay out an expired 2015 overpayment regardless of the amount.
What documentation do I need to support my 2015 Schedule A deductions?
You will need Form 1098 for mortgage interest, medical receipts, charitable contribution acknowledgment letters, and state and local tax payment records. Donated services are not deductible, but unreimbursed volunteer expenses, including mileage at the 2015 charitable rate, qualify. Form 8283 is required when total noncash donations exceed $500.
What was the AGI threshold for the Pease limitation on the 2015 Schedule A?
The 2015 Pease limitation reduced itemized deductions for taxpayers whose AGI exceeded $258,250 for single, $284,050 for head of household, $309,900 for married filing jointly, and $154,950 for married filing separately. Use the Schedule A worksheet to calculate your reduction.
What happened to the 2015 itemized deduction rules under the Tax Cuts and Jobs Act?
The TCJA (effective tax year 2018) suspended the Pease limitations and the 2%-of-AGI miscellaneous deductions floor through 2025, capped state and local tax deductions at $10,000, and modified other itemized deductions. For questions about IRS CP notices on amended filings, visit our notices guide.
What is the medical expense threshold on the 2015 Schedule A?
For 2015, medical and dental expenses were deductible only to the extent they exceeded 10% of adjusted gross income—or 7.5% if you or your spouse was born before January 2, 1951. Carefully total qualifying expenses and subtract the applicable AGI threshold before entering figures on lines 1–4.
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