
Schedule C (Form 1040): The Complete 2025 Guide for Sole Proprietors and Single-Member LLCs
File Schedule C with Form 1040 if you earned $400+ from self-employment. Learn filing thresholds, deductions, record-keeping, and audit red flags for sole
#self-employment-tax
Self-employment tax rules, calculations, and strategies for business owners

File Schedule C with Form 1040 if you earned $400+ from self-employment. Learn filing thresholds, deductions, record-keeping, and audit red flags for sole

Schedule K-1 reports your share of pass-through income from a partnership, S corporation, or trust — and you owe tax on your allocation, not on the cash you actually received. A working guide to each major box, the phantom income trap, partner basis rules, the 2026 filing timeline, and six mistakes that cost K-1 recipients real money every year.

A 2026 reference for Social Security tax: the 6.2% employee and employer rate, the $184,500 wage base, the 15.3% self-employment rate with its 92.35% adjustment, Form 941 deposit rules, and the six mistakes that most often trigger IRS payroll penalties against small businesses.

US 2026 tax write-offs for 1099 real estate agents: 72.5-cent mileage, home office, marketing, dues, and the 20% QBI deduction—plus deductions most agents miss.

How IRS Form 2210 works, when you must file it, the three safe harbors that prevent the underpayment penalty, and how Schedule AI reduces the bill for taxpayers with uneven income. Covers 2026 penalty rates (7% in Q1, 6% in Q2), due dates, and common mistakes.

A practical guide to small business taxes covering income tax, self-employment tax (15.3%), payroll taxes, 2026 quarterly estimated payment deadlines, IRS payment methods, and strategies to reduce your tax burden.

Independent contractors pay a 15.3% self-employment tax plus federal income tax on net profit. This guide covers quarterly estimated payment deadlines, every major Schedule C deduction, and year-round bookkeeping habits to minimize what you owe.

Filing IRS Form 2553 by the March deadline lets profitable small businesses and LLCs elect S-corp status, potentially saving over $12,000 annually by shielding distributions from the 15.3% self-employment tax.

LLCs offer flexible tax treatment — from pass-through taxation and the now-permanent 20% QBI deduction to S-Corp elections that can save $5,000–$50,000 annually. Covers every major LLC tax benefit, real savings examples, and the 2025 law changes that affect your filing strategy.

US Medicare tax has no wage cap: 2.9% base in 2026 plus Additional Medicare and NIIT for high earners — what you owe.

Self-employed individuals pay 15.3% in Social Security and Medicare taxes—double the employee rate. This guide covers how SE tax is calculated, legal strategies to reduce it (S corp election, retirement contributions, expense deductions), how deferral programs work, and what to do if you can't pay on time.

A practical breakdown of estimated quarterly tax payments for 2026 — who owes them, the four due dates (April 15, June 16, Sept 15, Jan 15), how to calculate using Form 1040-ES, and the safe harbor rules that shield you from IRS underpayment penalties.