This guide covers the 2026 form, each deduction category, the records you need, how the total reaches Form 1040, and how to avoid mixing rules from different tax years. All dollar amounts are US dollars. Spellings follow Australian convention, but the tax rules are US federal.
Key Takeaways
- Schedule A applies only when you itemise, and its total must beat your 2026 standard deduction.
- The form covers medical, taxes, interest, charity, casualty losses and a short list of other deductions.
- Check thresholds, caps and line numbers against the final IRS form and instructions before filing.
- Keep receipts, acknowledgements, appraisals and supporting forms.
What Is Schedule A and Who Should Use It?
Schedule A (Form 1040) reports your itemised deductions. When the total exceeds your standard deduction, it replaces that deduction on Form 1040.
The IRS currently lists the 2026 draft Schedule A with line 18 flowing to Form 1040 line 12e. The draft instructions still carry the 2025 year, and drafts cannot be filed.
Where It Fits in the 1040 Series
Itemised deductions reduce taxable income. Schedule 1 adjustments are separate "above-the-line" items, and credits subtract directly from tax. Never claim the same cost twice, for example on Schedule A and again on Schedule C, E or F.
The 2026 Standard Deduction Benchmark
The amounts below come from Revenue Procedure 2025-32.
| Filing status | 2026 basic standard deduction |
|---|---|
| Single | $16,100 |
| Married filing separately | $16,100 |
| Married filing jointly | $32,200 |
| Qualifying surviving spouse | $32,200 |
| Head of household | $24,150 |
Each age-65-or-older or blindness condition adds $1,650, or $2,050 if you are unmarried and not a surviving spouse. The enhanced senior deduction on Schedule 1-A is separate.
Who Should Run the Numbers
Calculate carefully if you:
- Pay mortgage interest on a main or second home
- Live in a high-tax state or locality
- Have large unreimbursed medical bills
- Make substantial charitable gifts
- Suffer a qualifying disaster loss
Situations That Need Extra Care
- Married filing separately: if one spouse itemises, the other's standard deduction is zero.
- Dependents: the standard deduction is generally the greater of $1,350 or earned income plus $450, capped at the regular amount.
- Business or rental expenses: these belong on Schedules C, E or F, not Schedule A.
- Nonresident aliens: most required filers use Form 1040-NR and its Schedule A, with narrower deductions and generally no standard deduction. Residency follows the US tests, not NRI or OCI labels.
2026 Schedule A Form 1040: Line-by-Line Instructions
The draft renumbers parts of the form. Casualty, other deductions and the total moved from lines 15–17 on the 2025 form to lines 16–18 in the 2026 draft. Confirm against the final form.
Medical and Dental Expenses: Lines 1–4
Only unreimbursed expenses above 7.5% of AGI count. The draft uses Form 1040 line 11b for AGI. If the floor exceeds your expenses, enter zero.
Qualifying costs include prescribed drugs, insulin, dental treatment, eyeglasses and hospital care. Over-the-counter drugs (other than insulin), funeral costs and generally cosmetic surgery do not qualify.
Watch these adjustments:
- Subtract insurance and FSA reimbursements.
- Tax-free HSA payments cannot also be itemised.
- Pretax employer-plan premiums are excluded; after-tax Medicare B/D premiums can qualify.
- Medical mileage is 20.5 cents/mile for 1 January–30 June and 23.5 cents for 1 July–31 December.
- Long-term-care premiums are capped by age, from $500 (40 or younger) to $6,200 (over 70).
Whole-dollar rounding is optional but must be consistent. Add components before rounding the total.
Taxes Paid and the SALT Limitation: Lines 5a–7
Choose either state and local income taxes or general sales taxes, never both. Add eligible real estate and value-based personal property taxes.
For 2026 the SALT cap is $40,400 ($20,200 if married filing separately). It falls by 30% of modified AGI above $505,000 ($252,500 MFS), but not below $10,000 ($5,000 MFS). MAGI adds back certain foreign-income exclusions, which matters for internationally connected filers.
Exclude:
- Foreign real and personal property taxes
- Service charges billed separately
- Assessments for improvements that add value
- Taxes tied to a business, rental or investment activity
Qualifying foreign income taxes may be itemised instead of claimed as a credit. Taxes on excluded foreign earned or housing income get neither benefit.
Interest Paid: Lines 8–10
Mortgage interest is deductible on acquisition debt up to $750,000 ($375,000 MFS) for loans taken after 15 December 2017. Earlier debt can keep the $1 million/$500,000 limits. The cap covers main and second home combined.
Home-equity interest qualifies only if you used the proceeds to buy, build or substantially improve the securing home. Debt used for personal spending doesn't count.
Other points:
- Form 1098 reports interest of $600 or more but doesn't override the legal limits.
- Points are usually spread over the loan term, with an exception for qualifying principal-home purchases.
- Mortgage insurance premiums return for 2026 on contracts issued after 2006. The deduction phases out from AGI of $100,000 ($50,000 MFS) and ends at $109,000 ($54,500 MFS).
- Investment interest comes from Form 4952, limited to net investment income, with excess carried forward.
Gifts to Charity: Lines 11–15
Charity is renumbered in the 2026 draft. A new floor applies: only contributions above 0.5% of your contribution base (generally AGI) count. The percentage ceilings still apply on top.
| Gift type | Ceiling (% of AGI) |
|---|---|
| Cash to public charities | 60% |
| Qualifying noncash gifts | 50% |
| Capital-gain property to public charities | 30% |
| Certain capital-gain gifts to other organisations | 20% |
Excess over a percentage ceiling generally carries forward five years. Amounts lost to the floor do not carry on their own.
The Tax Adviser illustrates the floor: with $100,000 AGI and $1,200 in cash gifts, the floor is $500 and the deduction is $700.
Substantiation rules:
- Gifts of $250 or more need a written acknowledgment, obtained by the earlier of filing or the extended due date.
- Noncash gifts over $500 generally need Form 8283.
- Noncash gifts over $5,000 generally need a qualified appraisal, with exceptions such as publicly traded securities.
- Vehicle deductions over $500 generally need Form 1098-C or equivalent, and are usually limited to sale proceeds.
Volunteer time, political gifts, personal gifts and most foreign charities are not deductible. Qualifying unreimbursed volunteer expenses may be.
Casualty Losses, Other Deductions and Total: Lines 16–18
Personal casualty losses now extend to qualifying state-declared disasters as well as federally declared ones. Form 4684 computes the loss. Ordinary disaster losses generally face a $100 per-event reduction and a 10% AGI reduction. Qualified disaster losses follow separate rules, so check Publication 547.
Gambling losses are limited to the lesser of 90% of losses or winnings.
Surviving "other" deductions include:
- Income-producing-property casualty and theft losses
- Estate tax on income in respect of a decedent
- Amortisable bond premium
- Claim-of-right repayments over $3,000
- Unrecovered pension investment
- Impairment-related work expenses
- Educator expenses not reported on Schedule 1
General employee expenses and tax-preparation fees remain suspended.
High earners face one more limit. Deductions are cut by 2/37 of the lesser of those deductions or the amount by which taxable income (increased by itemised deductions) exceeds the 37% bracket threshold.
Those thresholds are $768,700 joint, $640,600 single or head of household, and $384,350 MFS.
Add the category totals on line 18 and carry the result to Form 1040 line 12e. Line 19 is the election checkbox for filers who itemise even when the standard deduction looks larger, such as certain married-filing-separately situations. New line 12f covers non-itemiser charity and isn't part of Schedule A.
How to Prepare, Compare, Document and File Schedule A
Document Checklist
- Form 1098 and mortgage statements
- Property-tax bills and state-tax records
- Medical receipts and insurance statements
- Charitable acknowledgements and appraisals
- Form 4684, Form 4952 and Form 8283 where relevant
IRS guidance generally says to keep records three years after filing, six if you omit substantial income, and indefinitely for fraud or non-filing.
Calculation Order
- Classify each expense by category.
- Remove reimbursements and nondeductible portions.
- Apply floors, caps and phaseouts category by category.
- Total Schedule A, then apply the 2/37 limit if relevant.
- Compare with your 2026 standard deduction.
Foreign-Currency Expenses
Convert to US dollars. The IRS generally uses the spot rate when an amount is paid or accrued and accepts consistently applied posted rates. The yearly-average table isn't blanket permission for every deduction. Keep exchange-rate evidence, and don't claim foreign property taxes or foreign taxes in the wrong category.
Getting and Filing the Form
Download the form and instructions from IRS.gov's "About Schedule A" page and confirm the printed tax year. The final instructions are for 2025 and the 2026 form is a draft. Schedule A attaches to Form 1040 or 1040-SR, whether filed on paper or electronically.
Hypothetical Example (Illustrative Figures Only)
A single filer has $100,000 AGI.
| Category | Spent | Allowed |
|---|---|---|
| Medical (floor $7,500) | $12,000 | $4,500 |
| State income tax + property tax (under cap) | $11,000 | $11,000 |
| Mortgage interest | $9,000 | $9,000 |
| Cash gifts (floor $500) | $3,000 | $2,500 |
| Total | $27,000 |
That beats the $16,100 standard deduction by $10,900, so itemising wins. Review by a professional makes sense if gifts include property, the loan funded non-home spending, or you have foreign income.
VJM Global prepares US Form 1040 and 1040-NR returns, and can review documentation for taxpayers with cross-border or more complex deduction questions.
Common Schedule A Mistakes and Planning Considerations
Frequent Errors
Never rely on a prior-year form or on figures published elsewhere without checking the IRS form, instructions and enacted law for 2026. Typical problems:
- Deducting reimbursed medical costs
- Exceeding the SALT cap
- Claiming interest on debt that isn't qualified
- Deducting political gifts or volunteer time
- Missing written acknowledgments
- Putting business or rental expenses on Schedule A
An accuracy-related penalty can be 20% of the underpaid tax from negligence or substantial understatement, though reasonable-cause relief may apply.
Year-End Planning
- Track deductible costs all year.
- Remember timing: medical costs count when paid, and charity charged to a credit card counts in the year charged.
- Consider bunching gifts into one year to soften the 0.5% floor.
- Compare both methods every year.
- Talk to a tax professional before accelerating payments.
Conclusion: Making the 2026 Schedule A Decision
The process is the same every year. Verify the current form, calculate each category, apply every limit, then compare the total with the standard deduction.
Schedule A isn't a list of every personal expense. Keep support for each line, and get professional advice for unusual, high-value, business-related or cross-border situations.
Frequently Asked Questions
Who should file Schedule A instead of taking the standard deduction?
Generally, itemise only when your allowable deductions exceed the standard deduction, or when a filing situation such as married filing separately needs coordination. Compare both using 2026 figures.
What deductions can I claim on Schedule A (Form 1040)?
Medical and dental expenses, taxes, interest, charitable gifts, casualty and theft losses, and a short list of other deductions. Each has its own limits, documentation and sometimes a related form.
Where can I find Schedule A (Form 1040) for 2026?
Use IRS.gov's Forms and Instructions pages. Check the printed year, because the 2026 draft and the final 2025 form are different documents.
What does Form 1040 look like for 2026?
The current Form 1040 and its schedules are on IRS.gov. Line references can change, so check them against the official 2026 PDF. The draft shows the Schedule A total on line 12e.
What is the 1040 series and what are Schedules A, B, D, E, F and H?
It is the family of federal individual income tax forms. Schedule A covers itemised deductions, B interest and dividends, D capital gains and losses, E supplemental income, F farm income, and H household employment taxes.
