Free, no sign-up required. Updated for 2025 US tax brackets.
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Based on official 2025 IRS brackets with standard deduction.
2025 IRS brackets with standard deduction applied
Uses 2025 standard deduction ($14,600 single / $29,200 married). Federal only — state taxes not included.
Investing a fixed amount regularly is one of the most effective long-term strategies. Simulate your plan.
Model your recurring investment strategy
Find your FIRE number — the portfolio size where the 4% rule covers your annual expenses forever.
Based on the 4% safe withdrawal rate