You should incorporate when you make $1500 and/or when you need to start signing contracts. Why $1500? Stripe Atlas is $500 (comes with enough AWS credits to

You should incorporate when you make $1500 and/or when you need to start signing contracts. Why $1500? Stripe Atlas is $500 (comes with enough AWS credits to host your app for at least a year) and your increased accounting cost will be ~$1000 which is a high estimate. Your company will start at break even, and you will be able to start a clean paper/bank/accounting trail for your profits and expenses.