Corrections Policy

Accuracy matters on a site about decisions that can cost tens of thousands of dollars. When we get something wrong, we want to fix it quickly and openly. This policy explains how to report an error, how fast we act and how we show what changed.

How to report an error

Email Please use the contact form. or use our contact page and choose the corrections topic. Please include:

• the page address (URL) and, if it is long, the section or calculator field;
• what you believe is wrong;
• a link to an official or primary source that supports the correction, if you have one, such as an IRS page, a utility tariff or a state commission decision.

You can write in English, Spanish or Simplified Chinese. You do not need to give your name, though an email address helps if we need to ask a question.

What counts as an error

• Factual errors: a wrong number, date, rule, eligibility requirement or program status.
• Calculation errors: a calculator formula, default or worked example that gives the wrong result.
• Outdated information: a rule, rate or program that has changed since we last updated the page.
• Misleading wording: a statement that is technically true but likely to leave readers with the wrong impression.
• Broken or wrong links, including links that now point to a different document.

Differences of opinion, such as whether a battery is worth it in general, are not errors, but we are glad to hear them and may add context.

How fast we act

1. Acknowledgment. We aim to acknowledge every correction request within 3 business days.
2. Critical errors. If an error could cause readers financial harm, such as a wrong tax credit rule, deadline or eligibility condition, we aim to fix or flag it within 1 business day of confirming it.
3. Other factual and calculation errors. We aim to fix them within 5 business days of confirming them.
4. Broken links and minor issues. We fix them during the next scheduled update, usually within a few weeks.

If we need more time to verify a claim with a primary source, we may add a temporary note to the page saying the section is under review.

How we verify

We check every reported error against primary sources, the same way we check new content. If the report is correct, we fix the page and any other pages that repeat the same fact, in all three languages. If we conclude the page was right, we reply with the source we relied on.

How we note changes

• Corrections of factual or calculation errors are noted on the page with a short dated note explaining what was wrong and what we changed, for example: "Correction, 2026-10-20: An earlier version gave the wrong deadline for… We have fixed it."
• Substantive updates for rule changes, such as a new tariff or IRS guidance, update the page's "updated" date and include a brief dated note describing the change.
• Minor edits such as typos, formatting and clearer wording do not get a note, though the updated date may change.
• Calculator changes to formulas or defaults are recorded on the tool page with the date and what changed, so you can tell why a result differs from an earlier visit.

We do not silently remove or rewrite errors to hide them.

Updates to this policy

We may update this policy as the site grows. The date at the top shows the current version. You can read more about how we work in our editorial policy and methodology.