In general, the process of getting EIS Advance Assurance can take up to 8 weeks. This can vary depending on the accuracy of all the supporting documentation so it’s best to get this right the first time around to ensure as little back-and-forth with HMRC as possible. With all the correct information provided, 2 -3 weeks is possible. And since EIS is now exclusively done via the portal, processing times should be faster moving into 2023.