Your 83(b) deadline is in your lawyer's inbox. Track it free.
BildrX works out your 83(b) and 409A deadlines from your cap table records and shows the arithmetic. Add your own obligations with a jurisdiction and a due date.
Nobody wrote down the day the clock started
Your founder shares are issued on a Tuesday, and the 83(b) clock starts that day. Nobody writes the date down. Your 409A valuation sits in an email from the spring, and the adviser who knows both dates isn't watching your calendar. The first time anyone checks, the date has already passed.
BildrX does the sum and shows its work
Deadlines come from your records.
83(b) and 409A dates are derived from the entries already on your cap table. Nobody types a date in.
The arithmetic is on screen.
Each deadline shows how it was calculated, so you check it against your adviser's number.
Status is worked out live.
Every item reads upcoming, overdue or done, and the status updates on its own as dates pass.
Your own obligations sit beside them.
Add a custom obligation with its jurisdiction and due date, enter Form D by hand, and keep written consents in a log.
Put the issuances on your cap table and the dates follow
Import your cap table spreadsheet in under 30 minutes and Copilot walks you through setup. Once your issuances are on the cap table, the 83(b) and 409A dates follow. On Pro, 83(b) and 409A reminders come by email.
What's free, what's Pro
Free:
83(b) and 409A deadline tracking on a cap table for up to 30 stakeholders.
Pro:
- email reminders for 83(b) and 409A, plus unlimited stakeholders, vesting and round modelling.
- $49 a month, or $499 a year.
- Compare every plan on Pricing.
Cancel Pro anytime. Downgrade and nothing is deleted or hidden.
FAQ
No. BildrX works out and tracks the dates. Filing is for you and your adviser. BildrX is not a law firm and does not give legal or tax advice.
The built-in deadlines are 83(b) and 409A, which come from US tax rules. For a UAE or Saudi obligation, add a custom obligation with its jurisdiction and due date, and it carries a live status like the rest.
No. Email reminders cover 83(b) and 409A on Pro. Custom obligations and Form D show a live status and send no email.
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