Editorial Policy & Disclaimer

Last updated: July 16, 2026  ·  Effective immediately

1. Editorial Policy Overview

At Capital Gains Calculator, we believe that every taxpayer deserves access to accurate, transparent, and easy-to-understand tax information. Our editorial mission is to demystify capital gains taxation through reliable calculations, clear explanations, and thoroughly-verified data.

We hold ourselves to the highest standards of accuracy because financial decisions depend on the quality of information available. Every figure displayed in our calculator, every rate cited in our guides, and every piece of educational content published on this site undergoes a rigorous verification process before reaching our users.

Our editorial principles include:

• Accuracy first — All tax rates, brackets, and thresholds are sourced directly from official IRS publications and verified against multiple authoritative references before implementation.
• Transparency — We clearly disclose our data sources, methodology, limitations, and any potential conflicts of interest.
• Independence — Our calculator produces the same results regardless of advertising relationships or affiliate partnerships. Editorial integrity is non-negotiable.
• Timeliness — We update our data annually in alignment with the IRS publication schedule, and promptly when mid-year legislative changes affect capital gains taxation.
• User focus — We present complex tax concepts in plain language without sacrificing technical correctness.

2. Data Sources & Verification

The accuracy of our capital gains calculator depends entirely on the quality of underlying tax data. We source all figures exclusively from official government publications and cross-reference each data point against multiple authoritative sources before implementation.

Federal Long-Term Capital Gains Tax Brackets

Federal long-term capital gains tax rates and income thresholds are sourced from IRS Revenue Procedure 2025-32, published annually by the Internal Revenue Service. This Revenue Procedure provides the inflation-adjusted amounts for the tax year, including the 0%, 15%, and 20% capital gains rate thresholds for each filing status (Single, Married Filing Jointly, Married Filing Separately, Head of Household, and Qualifying Surviving Spouse).

Federal Short-Term Capital Gains (Ordinary Income Brackets)

Short-term capital gains are taxed as ordinary income. We source the federal income tax brackets from the same IRS Revenue Procedure, which publishes updated bracket boundaries for the 10%, 12%, 22%, 24%, 32%, 35%, and 37% marginal rates annually.

Net Investment Income Tax (NIIT)

The 3.8% Net Investment Income Tax thresholds are defined in Internal Revenue Code (IRC) Section 1411. These thresholds ($200,000 for Single filers, $250,000 for Married Filing Jointly) are statutory and not indexed for inflation. We verify these thresholds against the current IRC text and IRS Form 8960 instructions each tax year.

Standard Deductions

Standard deduction amounts are sourced from the annual IRS Revenue Procedure updates. These figures are critical for our calculator's income-stacking methodology when users provide gross income figures.

State Capital Gains Tax Rates

State-level capital gains tax rates are sourced from each individual state's Department of Revenue or Department of Taxation. Because states update their rates on varying schedules and through different legislative processes, we monitor all 50 states plus the District of Columbia for changes throughout the year. State data is cross-referenced with publications from the Tax Foundation and state-specific tax code sections.

Verification Process

Every data point undergoes a multi-step verification process:

1. Primary source identification — locate the official IRS publication or state government document.
2. Data extraction — record the exact figures from the primary source.
3. Cross-reference — verify against at least one secondary authoritative source (e.g., Tax Foundation, Congressional Research Service, or official IRS instructions for relevant forms).
4. Implementation testing — after coding the new rates into our calculator, we run a battery of test cases against known outcomes and manually-calculated results.
5. Peer review — a second team member independently verifies both the source data and calculated outputs before publication.

3. Calculation Methodology

Our calculator implements the IRS-prescribed methodology for computing capital gains tax liability. Below is a detailed explanation of how we arrive at our estimates.

The IRS Stacking Method

The IRS uses a "stacking" approach to determine the applicable capital gains tax rate. Long-term capital gains are "stacked" on top of ordinary income to determine which capital gains bracket applies. This means your ordinary taxable income fills up the lower brackets first, and your capital gains are then taxed based on where they fall in the remaining bracket space.

For example, if your ordinary taxable income places you near the top of the 15% capital gains bracket, some of your capital gains may be taxed at 15% while the portion that exceeds the bracket threshold is taxed at 20%. Our calculator precisely models these split-bracket scenarios.

Bracket Boundary Handling

When capital gains span multiple rate brackets, we compute the exact dollar amount subject to each rate. The calculator:

• Determines taxable ordinary income (after standard or itemized deductions).
• Identifies the remaining "room" in each capital gains bracket above the ordinary income level.
• Applies the appropriate rate (0%, 15%, or 20%) to each portion of the capital gain that falls within each bracket.
• Sums the tax from each bracket slice to produce the total federal long-term capital gains tax.

Net Investment Income Tax (NIIT) Calculation

The 3.8% NIIT applies to the lesser of: (a) net investment income, or (b) the amount by which Modified Adjusted Gross Income (MAGI) exceeds the applicable statutory threshold. Our calculator determines MAGI based on user inputs, compares it to the filing-status-specific threshold, and applies the 3.8% rate to the appropriate amount as defined in IRC Section 1411 and IRS Form 8960 instructions.

State Tax Layering

State capital gains taxes are calculated independently and added on top of the federal liability. Each state has its own bracket structure (or flat rate), exemptions, and rules regarding capital gains treatment. Our calculator applies the relevant state's methodology based on the user's selected state of residence. Some states tax capital gains as ordinary income, while others provide preferential rates or partial exclusions.

Reference Publications

Our methodology is guided by the following IRS publications and instructions:

• IRS Publication 550 — Investment Income and Expenses
• IRS Publication 544 — Sales and Other Dispositions of Assets
• Instructions for Schedule D (Form 1040) — Capital Gains and Losses
• Instructions for Form 8960 — Net Investment Income Tax
• Form 8949 — Sales and Other Dispositions of Capital Assets

4. Content Review Process

We maintain a structured content review cycle to ensure all information on our site remains current and accurate.

Annual Review Cycle

Each year, the IRS publishes updated tax figures (typically in October or November for the following tax year via a Revenue Procedure). Within 30 days of publication, we:

1. Extract all relevant figures from the new Revenue Procedure.
2. Update our calculator's underlying data tables.
3. Run our full test suite to validate correctness.
4. Update all educational content, guides, and examples that reference specific dollar amounts or rates.
5. Publish a changelog documenting all updates.

Mid-Year Legislative Changes

When Congress enacts legislation that affects capital gains taxation mid-year, we prioritize updating our tool within 7 business days of the law's effective date. We monitor legislative developments through official Congressional records, the Federal Register, and IRS guidance notices.

Fact-Checking for Educational Content

All guides, articles, and educational content published on this site undergo a fact-checking process that includes:

• Verification of all cited statistics and figures against primary sources.
• Review of legal citations for accuracy and currency.
• Confirmation that examples and scenarios produce mathematically correct results when run through our calculator.
• Assessment of content for potential misinterpretation or ambiguity.

5. Independence & Conflicts of Interest

Capital Gains Calculator is an independent publication. We are not owned by, affiliated with, or controlled by any financial services company, brokerage, tax preparation firm, or government entity.

Affiliate Relationships

We may participate in affiliate programs where we earn a commission when users click affiliate links and purchase products or services. All affiliate relationships are subject to the following strict policies:

• Affiliate links are clearly disclosed wherever they appear, in compliance with FTC guidelines.
• Affiliate partnerships do not influence our editorial content, calculator results, recommendations, or rankings.
• We only recommend products or services that we believe provide genuine value to our users.
• Our calculator produces identical results regardless of whether a user arrived via an affiliate link or any other channel.

Advertising Independence

Advertisers have no input into our editorial process. No advertiser can pay for favorable coverage, influence our calculator's methodology, or alter the results our tool produces. The wall between advertising and editorial is absolute.

6. Corrections Policy

Despite our rigorous verification process, errors can occasionally occur. We take every inaccuracy seriously and have a clear process for handling corrections.

When an Error is Discovered

• Immediate assessment — We evaluate the scope and severity of the error to determine its impact on users.
• Prompt correction — Material errors affecting calculator accuracy are corrected within 24 hours of confirmation. Minor typographical or formatting issues are corrected within 7 days.
• Transparent disclosure — Significant corrections are noted with a correction notice indicating what was changed and when. We do not silently alter published content without acknowledgment.
• Root cause analysis — We investigate how the error occurred and implement process improvements to prevent recurrence.

Reporting Inaccuracies

If you believe you have found an error in our calculator results, tax rates, or educational content, please contact us immediately at [email protected]. When reporting an issue, please include:

• The specific page or calculation in question.
• What you believe the correct information should be.
• A reference to the authoritative source supporting the correction (if available).

We review all reported inaccuracies and respond within 3 business days.

7. Limitations & Disclaimer

Estimates Only

All figures produced by our calculator are estimates. Actual tax liability may differ based on your complete financial situation, applicable deductions, credits, and other factors that our simplified tool cannot fully account for.

Not a Substitute for Professional Advice

This tool is designed to provide general estimates and educational insight. It is not a substitute for professional tax advice from a qualified Certified Public Accountant (CPA), Enrolled Agent (EA), or tax attorney. Tax law is complex and highly dependent on individual circumstances.

What Our Calculator Does Not Account For

Our calculator provides a focused estimate of capital gains tax liability but does not incorporate every possible tax provision. Specifically, our tool does not account for:

• Alternative Minimum Tax (AMT) — IRC Sections 55–59, which may impose additional tax liability for certain taxpayers.
• Depreciation recapture — Section 1250 unrecaptured gain taxed at 25% for real property or ordinary income rates for Section 1245 property.
• Qualified Small Business Stock (QSBS) — Section 1202 exclusions that may allow partial or full exclusion of gains from qualifying small business stock.
• Qualified Opportunity Zone (QOZ) deferrals — Section 1400Z-2 provisions allowing deferral or reduction of capital gains through investment in designated opportunity zones.
• Installment sales — Section 453 provisions for recognizing gain over multiple tax years when payment is received in installments.
• Wash sale rules — Section 1091 disallowance of losses when substantially identical securities are repurchased within 30 days.
• Like-kind exchanges — Section 1031 deferral of gains on qualifying real property exchanges.
• Collectibles gain — 28% maximum rate applicable to gains from collectibles under Section 1(h)(5).
• Foreign tax credits — Credits for taxes paid to foreign governments on investment income.
• State-specific deductions, credits, or exemptions beyond the standard state tax rate application.

Consult a Professional

We strongly encourage all users to consult with a qualified CPA, Enrolled Agent, or tax attorney for their specific tax situation, particularly if any of the following apply:

• You have complex investment portfolios with multiple asset classes.
• You have sold real estate subject to depreciation recapture.
• You are subject to the Alternative Minimum Tax.
• You have international investments or foreign income.
• You are considering opportunity zone investments or QSBS elections.
• Your situation involves estate, gift, or trust taxation.

No Fiduciary Relationship

Use of this website and calculator does not create a fiduciary relationship, attorney-client relationship, accountant-client relationship, or any advisory relationship between you and Capital Gains Calculator, its owners, or its operators. We owe no duty of care beyond providing information to the best of our ability as described in this editorial policy.

Assumption of Risk

By using this tool, you acknowledge that tax calculations are inherently complex, that our estimates may not reflect your actual tax liability, and that you are solely responsible for your tax filing decisions. Capital Gains Calculator shall not be held liable for any discrepancies between our estimates and your actual tax obligation.

8. Advertising Policy

We display advertisements on this website to fund ongoing development, maintenance, and free access to our capital gains calculator. Our advertising practices are governed by the following principles:

Why We Display Ads

Advertising revenue allows us to keep our calculator free for all users. Without advertising support, we would need to charge for access to the tool. We believe tax calculation tools should be accessible to everyone regardless of ability to pay.

Ad Serving

Advertisements on this site are served by Google AdSense. Google determines which ads to display based on page content and user browsing history (subject to Google's own privacy policies and user consent preferences). We do not directly select individual advertisements that appear on our pages.

Editorial Independence from Advertising

• Advertising does not influence our calculator's results, methodology, or accuracy.
• Advertising does not influence our editorial content, guides, or recommendations.
• Advertisers cannot pay for favorable mentions or preferential placement within editorial content.
• We maintain a strict separation between advertising operations and editorial/product decisions.

Affiliate Commissions

In addition to display advertising, we may earn commissions through affiliate links to third-party products and services. These links are always clearly marked with appropriate disclosure language (e.g., "affiliate link" or a disclosure statement). Affiliate relationships do not affect our editorial judgment or the accuracy of our calculator.

9. Contact Us

If you have questions about our editorial policy, wish to report an inaccuracy, or need clarification on any aspect of our methodology, please contact us:

Email: [email protected]

We aim to respond to all inquiries within 3 business days.