Check out this thread on Reddit: https://www.reddit.com/r/Frugal/comments/1cal0ff/comparing_costco_prices_instacart_vs_in_store/ https://www.reddit.com/r/Fruga

Check out this thread on Reddit: https://www.reddit.com/r/Frugal/comments/1cal0ff/comparing_costco_prices_instacart_vs_in_store/ https://www.reddit.com/r/Frugal/comments/1cal0ff/comparing_c... Short answers: - Yes, they mark up. 24%ish. - Markup may be different when shopping on IC directly versus Costco same day delivery (via IC). - Coupons like 50% off orders over $xx changes that math. - Factor in tip into the equation.