My feeling would be that 2-4% plus a market rate salary would be about right post the first VC funding round. Ahead of that, then the offer feels too low - particularly as you are effectively investing your salary on a monthly basis.
One mechanism you could apply - take your personal valuation of the current worth of the business IP and divide it by your notional annual salary for the next couple of years. What percentage does that come out at?
2-4% and a market rate salary after a VC funding round is about market rate for an experienced executive, eg someone brought in to be a VP of Engineering.
One mechanism you could apply - take your personal valuation of the current worth of the business IP and divide it by your notional annual salary for the next couple of years. What percentage does that come out at?