Editorial & Fact-Check Policy
Estimated Tax Easy Guide is part of Easy Guides, a family of plain-English guides that explain confusing official processes, tax forms, paychecks, and government paperwork, in language anyone can follow. This page explains who produces our content, how we check it, and how we handle mistakes.
Who writes our guides
Our guides are produced and published by the Easy Guides editorial team, which owns and enforces our editorial standards. We are not a law firm, an accounting firm, or the IRS, and we say so plainly on every guide. We are a small independent publisher whose single job is turning official, jargon-heavy instructions into steps a normal person can act on.
How we research and write
Every guide starts from primary sources, the official documents that actually govern the topic, not other blogs. For Estimated Tax Easy Guide, that means IRS Form 1040-ES and IRS Publication 505 (Tax Withholding and Estimated Tax). We link those sources directly inside each guide so you can verify anything yourself.
How we fact-check
Every federal figure on this site comes from one file we maintain, not from whatever a page happened to say when it was written. That file records the document each number came from and the date a person last checked it against that document. The current check date is 1 August 2026, against IRS Revenue Procedure 2025-32, IRS Notice 2025-67 and the Social Security Administration's 2026 wage base release.
This site states few federal dollar figures, so few pages carry a printed source line. The guidance here rests on IRS Form 1040-ES and section 6654 of the tax code, which is where the safe-harbour percentages actually come from, which we link directly inside the guides.
Accuracy and corrections
A corrections policy that has never described a correction is not evidence of anything, so here is a real one.
On 1 August 2026 we corrected the Social Security wage base to the 2026 figure. It had been showing the previous year's number. The same day we put the quarterly calculator under an acceptance suite so that an out-of-date figure fails a build instead of reaching a reader.
If you find something wrong, email [email protected] with the page and the problem. We check it against the primary source and fix confirmed mistakes at the source the page is generated from, which is the only correction that stays fixed.
This is education, not professional advice
Our guides are educational. They are not tax, legal, or financial advice, and reading them does not create a professional relationship. For advice about your specific circumstances, consult a qualified professional or the relevant official source, such as IRS.gov.
How we use tools
The quarterly tax calculator run entirely in your browser. Nothing you type is sent anywhere, because there is nowhere for it to be sent. Their arithmetic is covered by 15 assertions that run against the same code this site ships to you, not against a copy that might have drifted from it. A calculator that produces the wrong answer fails a build here.
Each tool also carries a section saying when it is the wrong tool for your question, on 1 pages of this site. A tool that never tells you it cannot help you is an advertisement with arithmetic in it.
We use modern research and drafting tools to work faster. Every guide is checked by a person against the primary sources above before it goes live. The accuracy standard and the final judgement are human, and they are ours.
Contact
Questions about how we work? Email [email protected].