Why Estimated Taxes Aren't Deductible
Estimated tax payments are prepayments of your income tax liability. They reduce what you owe (or increase your refund) when you file your return, but they're not a business expense. Think of it like paying rent in advance — the payment itself isn't a separate deduction, it's just paying what you already owe. The underlying income and deductions that determine your tax liability are what matter.Who Needs to Pay Estimated Taxes
You generally need to make estimated payments if you expect to owe $1,000 or more in federal tax after subtracting withholding and credits. This includes self-employed individuals, freelancers, landlords with rental income, and anyone with significant income not subject to withholding. The IRS expects payments quarterly: April 15, June 15, September 15, and January 15 of the following year.
Safe Harbor Rules
To avoid underpayment penalties, pay at least 90% of your current year tax liability OR 100% of last year's tax (110% if your AGI exceeded $150,000). Most self-employed people use the prior year safe harbor — pay what you owed last year divided by four, and you won't be penalized even if you earn significantly more this year.
To avoid underpayment penalties, pay at least 90% of your current year tax liability OR 100% of last year's tax (110% if your AGI exceeded $150,000). Most self-employed people use the prior year safe harbor — pay what you owed last year divided by four, and you won't be penalized even if you earn significantly more this year.
Example: Freelancer Quarterly Payments
You're a freelance designer who owed $12,000 in total federal tax last year. Using safe harbor, you pay $3,000 per quarter ($12,000 / 4). Even if you earn double this year and owe $24,000, you won't face underpayment penalties. You'll owe the remaining $12,000 when you file, but no penalty.
State Estimated Taxes and SALT
State and local estimated tax payments can be deducted on your federal return as part of the State and Local Tax (SALT) deduction. However, the SALT deduction is capped at $40,000 (raised from $10,000 by the OBBBA in 2025) ($5,000 if married filing separately). This means if you're already paying $10,000+ in property taxes, your state estimated payments provide no additional federal deduction.Track Quarterly Payments
Hivebooks tracks your estimated tax payments alongside your income and expenses, so you always know where you stand before each quarterly deadline.
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