Self-Employment Calculator for US Taxes - 2025
Calculate the Self-Employment Tax (15.3%): Social Security, Medicare and Additional Medicare Tax. Including deductions for self-employment tax, Qualified Business Income (QBI) deduction and estimated quarterly payments.
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Calculating Self Employment Taxes
Tax Deductions and Federal Levy
Total Summary
Quarterly Payment Deadlines for 2025
Use the Form 1040-ES to pay estimated taxes and consider using the Safe Harbor method to avoid penalties.
Come utilizzare US Self-Employment Tax Calculator 2025
Inserisci il reddito netto da lavoro autonomo
Il reddito netto e il guadagno lordo meno le spese aziendali deducibili. La SE tax si applica al 92.35% di questo importo.
Seleziona il filing status
Il filing status determina le aliquote fiscali, la standard deduction e la soglia per l'Additional Medicare Tax.
Verifica la QBI Deduction
La Qualified Business Income deduction permette di detrarre fino al 20% del reddito da lavoro autonomo. Soggetta a limitazioni per redditi alti.
Pianifica i pagamenti trimestrali
I lavoratori autonomi devono pagare l'imposta stimata trimestralmente. Usa l'importo trimestrale calcolato per i Form 1040-ES.
Suggerimenti
- Tieni tutte le ricevute delle spese aziendali: merce, attrezzature, home office, auto, assicurazione sanitaria. Riducono il reddito netto e quindi la SE tax.
- Considera di aprire un SEP-IRA o Solo 401(k): puoi dedurre i contributi (fino a $70,000/anno) riducendo significativamente la base imponibile federale.
- L'assicurazione sanitaria per lavoratori autonomi e 100% deducibile come above-the-line deduction, riducendo l'AGI prima della QBI deduction.
- Usa il metodo safe harbor per i pagamenti trimestrali: paga almeno il 100% dell'imposta dell'anno precedente (110% se AGI > $150,000) per evitare penali.
Domande frequenti
What is Self-Employment Tax?
Self-Employment Tax is the equivalent of Social Security + Medicare paid by employees. Employees pay 7.65%, employer pays 7.65%; self-employed pay both (15.3%), but can deduct 50% from taxable income.
Why does it apply to 92.35% of income?
Factor 92.35% (or 1 - 0.0765) simulates the employee's situation, where the employer pays 7.65% above gross salary, reducing taxable income slightly for SE tax.
What is the QBI Deduction?
Qualified Business Income (QBI) deduction, introduced by the Tax Cuts and Jobs Act 2017, allows self-employed workers to deduct up to 20% of qualified income. Available for 2025 but subject to phase-out for incomes above $197,300 (single) / $394,600 (MFJ) for certain professions.
What are quarterly tax payments?
Self-employed workers must pay estimated taxes four times a year through Form 1040-ES. Typical deadlines are April 15, June 16, September 15, and January 15. Missing these payments incurs penalties (underpayment penalty).
What is the Additional Medicare Tax?
The 0.9% surcharge applies to income above $200,000 for single filers or $250,000 for joint filers who file a combined return. Not paid by the employer for employees and fully borne by self-employed individuals.