Form IT-203-A: Business Allocation Schedule for Nonresidents and Part-Year Residents (2026)

Last reviewed: 2025-10-29

Use the New York Tax Form Calculator Form IT-203-A — Business Allocation Schedule as a stand alone tax form calculator to quickly calculate specific amounts for your 2026 New York state tax return. Alternatively, you can use one of our Combined Federal and State Tax Estimators to quickly calculate your salary, tax, and take-home pay.

Form IT-203-A is used with nonresident and part-year returns to allocate business income to New York. If your books and records clearly show the portion of income derived from New York sources (or the MCTD), you may use the books method. If not, you must use the formula basis in Schedule B, averaging the property, payroll, and gross income factors to compute a business allocation percentage that you apply to the Federal-amount column on IT-203.

Use Schedule A to list every location where you carry on business (both inside and outside New York and the MCTD). Then complete Schedule B if your records do not isolate the New York portion. Keep consistent methods year over year unless a change is warranted and documented.

1. Who files: Nonresidents and part-year residents with business income (sole proprietorship, partnership, S-corporation pass-through, rental business activity) that may be sourced to New York.
2. Books vs. formula: If your books reliably show New York amounts, you may allocate using books. Otherwise, complete Schedule B and average the property, payroll, and gross-income percentages.
3. All locations disclosed: List every business location on Schedule A (street, city/state, brief description). Omit none—completeness helps defend your apportionment.
4. Factor consistency: Use the same measurement period for Column A (everywhere) and Column B (New York or MCTD). If a factor is not applicable (e.g., no payroll), average the remaining applicable factors.
5. MCTD self-employment: Line 10 allocates net earnings from self-employment to the MCTD using the business allocation percentage; carry the result to IT-201/IT-203 lines referenced in your return to support MCTMT calculations.

Schedule A — Where You Do Business

List all places you conduct business, including home offices, client sites, and leased premises. Use clear descriptors (e.g., “design studio,” “retail showroom,” “contract fulfillment center”). If the MCTD applies, identify locations within the MCTD. This schedule supports both New York sourcing and MCTD allocations.

Books method: If your accounting clearly tracks New York sales, New York payroll, and New York property, you may allocate on that basis and skip Schedule B. Ensure your ledgers, invoices, and payroll registers reconcile to the amounts carried to the New York column on IT-203.

Schedule B — Formula Basis (Property, Payroll, Gross Income)

Property factor: Include real property and tangible personal property used in the business. Rented items and leased facilities should be included as directed by the form instructions. Use the same period and valuation approach for Column A (everywhere) and Column B (New York).

Payroll factor: Include wages, salaries, and other compensation paid to employees for services. Report in Column B only the portion for services performed in New York. Do not include amounts paid to independent contractors in payroll; they belong, if applicable, in gross income.

Gross income factor: Use business gross receipts or gross income per instructions. For service businesses, source to New York when the benefit of the service is received in New York or as instructed for your activity; for tangible goods, source where the sale is attributed under the rules that apply to you.

Averaging and percentage: Compute Column C for each factor (Column B ÷ Column A). Add the valid percentages and divide by three (or by the count of applicable factors if fewer than three). The result is your business allocation percentage (line 8).

Applying the Percentage to Income (Lines 9–10)

Multiply each allocable business item shown in the Federal-amount column on IT-203 by the percentage from line 8. Enter the New York result on the provided lines and carry to the New York column of IT-203. Repeat for each line that requires allocation and attach schedules if you need more lines.

MCTD self-employment (line 10): Multiply your net earnings from self-employment by the business allocation percentage to determine the amount attributable to the MCTD. Carry to the line referenced on IT-201/IT-203 for MCTMT purposes.

Worked Examples

Example 1 — Two-factor business (no payroll): Property Column C = 40.00%, Gross-income Column C = 20.00%. With no payroll, average the two factors → (40% + 20%) ÷ 2 = 30.00% business allocation percentage. Apply 30.00% to each allocable business line and to self-employment earnings for MCTD.

Example 2 — Three-factor business: Property 25.00%, Payroll 50.00%, Gross income 35.00%. Sum = 110.00% ÷ 3 = 36.67%. If your Federal-amount Schedule C net profit is $120,000, New York business income = $120,000 × 36.67% = $44,004. Report this in the New York column on IT-203. If net earnings from self-employment are $110,000, MCTD earnings = $110,000 × 36.67% = $40,337 (line 10).

Example 3 — Books vs. formula: Your books separately track New York receipts and costs with reliable job-costing. If the figures are complete and consistent, you may allocate using books instead of Schedule B. Retain the detail—auditors often test that the method is consistently applied.

Planning & Risk Control

Be consistent: Use the same allocation method annually unless your facts change. If you change methods, document why the new method better reflects New York activity and keep the support with your return.

Substantiation: Keep a permanent file with property ledgers, lease summaries, payroll registers by work location, sales detail by ship-to or service location, and reconciliations to financial statements. Tie every number on IT-203-A back to books, and ensure the New York column on IT-203 agrees to your Schedule B math.

Cross-form coordination: If your allocation affects credit limitations or modifications, confirm impacts on IT-225 (modifications), IT-112-R (resident credit mechanics if applicable), and city/Yonkers/MCTMT lines on IT-201/IT-203. Accurate allocation reduces adjustments and interest.

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Important Notes

All calculations are estimates for guidance only. Always review your return and consider professional advice when submitting official filings.