About NextyFy
Free US tax calculators and guides, sourced directly from IRS publications and Treasury regulations. Transparent, dated, and free of paywalls.
NextyFy publishes free US tax calculators and educational guides, built on top of official IRS data.
Our mission is to make accurate tax information accessible without paywalls, subscriptions, or sales funnels. Every number on this site can be traced back to its source — an IRS Revenue Procedure, a Treasury regulation, or a state department of revenue document.
What NextyFy Is — and Is Not
NextyFy is an independent editorial publicationcovering US federal and state taxation. We don't employ CPAs or Enrolled Agents, and we don't offer personalized tax advice. What we do is read the primary sources — IRS publications, Treasury regulations, state tax codes — and translate them into calculators and plain-English guides, with every figure linked back to where it came from.
How we operate:
- •Every tax bracket, contribution limit, and deduction figure is sourced from an official IRS Revenue Procedure or Publication, cited inline.
- •Each article shows its publication date and last review date. We re-verify content annually against the latest IRS releases.
- •Calculators run entirely in your browser. No income, name, or financial input ever leaves your device.
- •Nothing on NextyFy is professional tax, legal, or financial advice. For your specific situation, consult a licensed CPA or Enrolled Agent.
Our Methodology & Data Sources
Every calculator on NextyFy is built using a rigorous, transparent process to ensure accuracy and reliability:
Official IRS Publications
Tax brackets, standard deductions, and contribution limits are sourced directly from IRS Revenue Procedures and Publications (Rev. Proc. 2024-40, Publication 15-T, Publication 505).
State Tax Authorities
State income tax rates and brackets are sourced from each state's department of revenue or taxation official documentation.
Annual Review Process
Calculators and guides are re-checked against the latest IRS releases at least once per tax year. Each article displays its last review date in the footer.
Client-Side Processing
All calculations run directly in your browser. No financial data is ever transmitted to our servers, ensuring complete privacy.
What We Do
We specialize in creating comprehensive tools and educational content across key areas of personal finance:
- Federal Income Tax: Accurate calculators for all filing statuses and tax brackets
- State Taxes: State-by-state tax calculators and guides for all 50 states
- Payroll & Self-Employment: Social Security, Medicare, and self-employment tax tools
- Investment Taxes: Capital gains, property tax, and sales tax calculators
- Tax Education: In-depth guides explaining complex tax concepts in plain English
Our Promise to Readers
- Sourced, not made up: Every figure links back to an IRS publication, Revenue Procedure, or state tax authority document
- Dated transparently: Every article shows publication and last-review dates — no quiet edits, no stale numbers
- Privacy by design: All math runs in your browser; no input ever leaves your device
- Free, always: No paywalls, no email gates, no premium tier
- Honest about scope: Educational content only — we never claim to be your tax advisor
Editorial Standards
Tax content falls under what Google calls YMYL (Your Money, Your Life). We can't replace a CPA, but we can be rigorous about where our numbers come from:
- Primary sources only: Tax brackets, contribution limits, and deduction amounts come from IRS Revenue Procedures and Publications. State data comes from state department of revenue documents.
- Inline citations: Each article ends with a Sources section listing the specific IRS publications and government documents it draws from.
- Dated reviews: Every article displays its publication date and most recent review date. Stale content is re-checked or retired.
- No advice, ever: NextyFy is educational. We will never tell you what to do with your taxes — only what the law currently says.
Our Commitment
We are committed to providing you with the most up-to-date and reliable information possible. Our calculators are built using official IRS tax tables and formulas, and we continuously monitor for changes in tax legislation.
While we strive for perfection, tax laws can be complicated and subject to change. We always recommend consulting with a qualified tax professional for your specific situation, but we're here to give you the best starting point possible.
Contact Us
Have questions, suggestions, or found an error? We'd love to hear from you. Reach out to us at contact@nextyfy.com and we'll respond within 24-48 hours.
Editorial Model
NextyFy doesn't use bylined authors. Articles are published under the NextyFy Editorialattribution because the value we offer isn't a personality — it's the discipline of always pointing back to the primary source.
Source-first
Numbers come from IRS Revenue Procedures, Publications, and state department of revenue documents — cited in every article's Sources section.
Dated, not anonymous
Publication date and last review date appear on every article. No silent edits — if a figure changes, the review date moves with it.
Educational, not advisory
We explain what the rules say. For decisions about your specific return, talk to a licensed CPA or Enrolled Agent — we're not one.
Spot an inaccuracy or have a correction? Email contact@nextyfy.com — we publish corrections with the review-date stamp.