Why freelancers pay quarterly
When an agency or client pays you on a 1099, nobody withholds tax from your pay. The IRS still expects tax to be paid as income is earned, so most freelancers make estimated payments four times a year. If you expect to owe a meaningful amount at filing time, skipping these payments can lead to underpayment penalties.
Many interpreters work a mix of W2 and 1099 jobs. W2 withholding helps, but it often does not cover the tax on your freelance income, especially self-employment tax.
The due dates
Estimated payments for a tax year are generally due around April 15, June 15, September 15, and January 15 of the following year. When a date falls on a weekend or holiday, it moves to the next business day. Notice the periods are uneven. The second payment comes only two months after the first.
Most states with an income tax have their own estimated payment schedule, often on the same dates. Check your state revenue department.
How to estimate what you owe
Start with your net freelance income: what you were paid, minus business expenses such as mileage, certification fees, CEU costs, and equipment. Self-employment tax covers Social Security and Medicare and applies to most of that net amount. Income tax applies on top of it, based on your bracket.
A common shortcut is to set aside a fixed percentage of every 1099 payment. Many freelancers use somewhere between 25 and 30 percent, but the right number depends on your income, state, and household. A tax professional can help you choose one and review it once a year.
Keeping it calm
Move your set-aside into a separate savings account the day a payment lands. Review your year-to-date income before each due date, so the payment is based on real numbers rather than a guess. Keep your expense records current, since every documented expense lowers the amount you owe.
Schedulog tracks 1099 and W2 income side by side, applies your set-aside percentage per payer, and reminds you before each quarter. This guide is general information, not tax advice.