File Taxes With 1099 Income

This interactive checklist is for a contractor who received 1099s and is filing a 2026 return. It walks through income, expenses, SE tax, and estimated payments.

Work through each item and note what is still missing. The checklist is a planning aid, not tax advice.

Collect every 2026 Form 1099-NEC, 1099-MISC and 1099-K you received Add income that came without a 1099; it is still reportable Total business expenses with receipts Work out net profit (Schedule C) Figure SE tax on Schedule SE if net earnings are $400 or more Take the deductible half of SE tax in figuring AGI List estimated payments made (dates and amounts) Check the 90% current-year / 100% prior-year safe harbor Keep copies of everything with your return

Want a number? Use the SE tax estimate or taxes owed estimate.

Worked example

You received a 1099-NEC for $45,000 and had $5,000 of expenses, so net profit is $40,000. Net earnings are $40,000 x 92.35% = $36,940. SE tax is about $36,940 x 15.3% = $5,652. If you type 18% for income tax, that adds about $7,200. If you paid $9,000 in estimates, the balance due is about $3,852. The employer-equivalent half of SE tax (about $2,826) is deductible in figuring AGI, which affects income tax only.

Common mistakes

Leaving out a 1099 that arrived late. Missing estimated payments already made. Forgetting that estimated tax is generally required if you expect to owe $1,000 or more.

Records to keep

Keep all 1099 forms, expense receipts, estimated payment confirmations, and your profit totals. Note the 2026 due dates: April 15 2026, June 15 2026, September 15 2026, and January 15 2027.

• IRS: Self-employment tax (Social Security and Medicare taxes)
• IRS: Schedule SE (Form 1040)
• IRS: Form 1040-ES (2026)

Questions

Who is this checklist for?

A contractor who received 1099s and is filing a 2026 return.

Does it calculate my tax?

No. It is a checklist. Use the estimate tools for figures.

What if I owe $1,000 or more?

Estimated tax is generally required in that case.

Data checked 2026-10-31 against the linked irs.gov pages.