In most day-to-day situations for gig workers (Uber, Postmates, Instacart), meals are not tax-deductible.
However, in special circumstances, you can deduct 100% of your meal if you meet one of these requirements:
1) you're driving out of town for business, and it would be unreasonable for you to provide food for yourself from home
2) you're sharing a meal with a potential referral or client
3) you drive for an abnormally long distance in which you’re unable to provide food for yourself due to an unexpected overnight stay.
Stride Tip: Rideshare companies have referral programs that reward drivers with cash bonuses when their driver referrals sign up to drive with Uber/Lyft. Meals that you purchase while recruiting other drivers are also tax deductible!