Thanks - how does the company then get the tax relieved element of the cash?
I just wanted to point out that you do not get tax relief for an SEIS investment by making your investment net of tax relief as you would with a personal pension contribution. Take a look here for information on how it works.
The whole point of SEIS is for small companies to use the investment to grow their businesses and if they had to wait to get some of the investment from HMRC, that would be ludicrous, frankly. I have dealings with an SEIS investment manager who vets applicant companies so I know how this works.
I hope this helps but let me know if you have any further questions.