There is no single answer; the escrow agreement sets the period, and it may be extended. What the documents cannot do is fix the date of any government decision. Deployment timing also affects when the investment is at risk, so ask counsel how the specific schedule interacts with the petition being prepared.
Set review dates around the escrow clause
Diary the dates the agreement itself creates: any long-stop release date, extension options, and reporting obligations. Alongside them, track the petition filing date, the priority date it establishes, and periodic checks of visa availability in the relevant category. If conditional residence follows, the petition to remove conditions is ordinarily filed in the ninety days before the second anniversary.
Revisit the whole schedule whenever the sponsor amends a deadline. Put the dates the escrow agreement itself creates into the calendar first: any long-stop release date, extension options, and reporting obligations. Then add the dates that do not depend on the sponsor: the filing date and the priority date it establishes, periodic checks of visa availability in the relevant category, and, where conditional residence follows, the ninety-day window before the second anniversary in which the petition to remove conditions is ordinarily filed.
Conditional permanent residence lasts two years, and removal of conditions rests on evidence gathered during that period rather than assembled at the end. Revisit the whole schedule whenever the sponsor amends a deadline, and ask why the amendment was needed.