What changed

About these updates

Each update below corresponds to a material change in the BizTaxMetrics calculator or a state page. We publish an update when a federal rate changes, a state fee is adjusted, a new tax provision takes effect, or we correct an error in our data. Every update links to the official source — IRS publications, state Secretary of State fee schedules, or the relevant statute.

We do not publish commentary on tax policy, legislative proposals, or hypothetical scenarios. If it does not change a number on the site, it does not appear here. For the underlying methodology and data sources, see the methodology page.

The BizTaxMetrics calculator is rebuilt and re-audited annually against the latest IRS publications and state fee schedules. Between annual rebuilds, individual state pages or federal figures may be updated independently when a specific change is confirmed. Each update on this page documents exactly what changed, when it took effect, and which source publication or statute supports the new number.

How to read an update

Each update post includes the effective date of the change, a summary of what changed and why it matters, the affected calculator or state page, and a link to the official source data. If the change affects the calculator's output, we note whether the net modeled benefit increases or decreases and by approximately how much at the default $100K profit / $50K salary inputs. You can then open the calculator and adjust the sliders to see how the change affects your specific numbers.

We also maintain a running log of all changes in the site's version history. If you need to verify what the calculator showed at a particular point in time, check the update posts in reverse chronological order. Each post is dated and includes the tax year it applies to.