Research & Calculator Methodology

Our calculators separate user-entered facts from editable planning assumptions. Results show intermediate values so readers can understand how the estimate was produced.

Source hierarchy

For tax and regulatory facts, we prioritize government publications and current official forms. For platform fees and payout rules, we prioritize current platform documentation. Independent reporting and first-hand testing supplement—not replace—primary sources.

Review and updates

Money and tax pages identify the author, reviewer where applicable, material sources, publication or update date, limitations, and commercial disclosures. Calculator assumptions are reviewed when official rates change.