Shipping Methods at Simple Fulfillment

Simple Fulfillment offers four flat-rate shipping methods that correspond to our published pricing tiers:

All methods use "Cheapest" carrier selection, meaning we automatically select the most cost-effective carrier that meets your delivery timeframe.

Mapping Methods to Your Store

You can map your Shopify or cart shipping methods to our fulfillment methods in your settings: shipsfor.us/settings/shipping/

This ensures orders automatically route to the correct service level based on what your customer selects at checkout.

Changing Methods on Individual Orders

Need to upgrade or change the shipping method on a specific order? You can adjust this directly on the order before it ships.

If you select a carrier-specific method (such as USPS Priority Mail, UPS Ground, FedEx Home Delivery, etc.), your order will NOT be charged at our flat-rate pricing. Your order will be billed outside of our flat-rate pricing structure and will typically cost more. Our flat-rate pricing only applies to the four methods listed above.

A Note on Edge Cases

While our flat-rate pricing covers the vast majority of shipments, certain scenarios may incur additional fees—such as Zone 9 destinations, PO Box deliveries, or situations where our preferred carriers (UPS/FedEx) cannot be used (for example, a heavy package to a PO Box). If you have questions about a specific shipment or your account's shipping setup, reach out to your Account Manager or contact us at team@simplefulfillment.com.

Updated on: 03/02/2026