Why is the final total on my Postmates order different than expected?

If you should order from a merchant that is not one of Postmates partners the prices listed with be estimates. If you see the subtotal displayed as "Estimated Subtotal" that means the final price could change. The final subtotal will be calculated based on what Postmates pays the merchant and associated fees. When placing an order from one of Postmates partners, the price you see at checkout will be the price you pay.