Formula
Lock-up expiry date = IPO date + lock-up period in calendar days.
Finance & Capital Markets
IPO Lock-up Expiry Calculator
Calculate the expiry date of an IPO lock-up period and show common 90, 180 and 270 day windows.
Calculator
Working calculator
Live result2026-12-04IPO 2026-06-07 plus 180 calendar days. Common windows: 90 days 2026-09-05; 180 days 2026-12-04; 270 days 2027-03-04.
Formula used
Lock-up expiry date = IPO date + lock-up period in calendar days.
This is the method behind the answer, so the result can be checked rather than simply trusted.Visual grid
This number is one point on a larger pattern
IPO Lock-up Expiry is not just a final answer. It is a step on a line: before and after, input and output, assumption and result.
Micro-timehours, minutes, shiftsHuman scaledays, weeks, projectsMacro-timemonths, years, calendars
InputFormulaResult
2026-12-04CalculationTime keeps the path visible: the input, the method and the final number belong together.
CalculationTime
IPO Lock-up Expiry Calculation Report
2026-12-04IPO 2026-06-07 plus 180 calendar days. Common windows: 90 days 2026-09-05; 180 days 2026-12-04; 270 days 2027-03-04.
Inputs
- IPO year
- 2,026
- IPO month
- 6
- IPO day
- 7
- Lock-up period
- 180 days
Method
Lock-up expiry date = IPO date + lock-up period in calendar days.
- For an IPO date of 2026-06-07 and a 180-day lock-up, the expiry date is 2026-12-04.
Assumptions
- This calculator is for planning and education, not legal, tax, medical, immigration, engineering or financial advice.
- Use current official rates, contracts, carrier terms, statutes or professional guidance before relying on the result.
- The default values are examples. Replace them with the figures from the job, invoice, contract, bill, service or record being checked.
Notes
Use this space on the printed report for client, supplier, classroom, job-location, measurement, quote or approval notes.
Worked example
For an IPO date of 2026-06-07 and a 180-day lock-up, the expiry date is 2026-12-04.
Professional note
Professional note: print the input values, formula, result and date together so the calculation can be reviewed later.
Regional and unit assumptions
Basis: transparent planning arithmetic using the visible inputs and assumptions on this page.
Assumptions and limitations
- This calculator is for planning and education, not legal, tax, medical, immigration, engineering or financial advice.
- Use current official rates, contracts, carrier terms, statutes or professional guidance before relying on the result.
- The default values are examples. Replace them with the figures from the job, invoice, contract, bill, service or record being checked.
Methodology & Accuracy
How this calculator is checked
CalculationTime pages are built around visible arithmetic: the formula, assumptions, worked example and practical limitations are shown so the result can be checked rather than simply trusted.
Formula used
Lock-up expiry date = IPO date + lock-up period in calendar days.
Standard or basis
Basis: transparent planning arithmetic using the visible inputs and assumptions on this page.
Where a calculator follows a named legal, trade or industry standard, that standard is cited visibly. Otherwise the page uses transparent general arithmetic and states its limits.Master's Tip
Professional note: print the input values, formula, result and date together so the calculation can be reviewed later.
Related calculators
Questions
What is the IPO Lock-up Expiry Calculator?
The IPO lock-up calculator adds the chosen lock-up period to the IPO date and displays the expected expiry date.
Can I rely on this as professional advice?
No. Use it as a transparent planning estimate, then verify the current rule, rate, contract or official source for the decision you are making.