Guides

Inventory guides for Shopify merchants

Every formula and default behind Posto's recommendations, with a worked example you can check.

Where to set cost per item in Shopify, how to update it in bulk, and why it goes out of date.

What to ask Shopify Sidekick about reordering, what to tell it, and how to check its answer.

Set up free low-stock emails with Shopify Flow, step by step, and pick a threshold that actually works.

Order-by moments for 2027, from Lunar New Year to holiday gifting, with a simple way to plan each one.

The 2027 date, why the slowdown lasts weeks, and when to order so you're not caught short.

Two ways to cost the stock you sell, with a worked example and when each fits.

The difference between when to order and the cushion inside it, with a worked example.

How to receive part of an order, follow up on the rest, and keep stock and costs right.

What to put on a purchase order, the email to send with it, and habits that keep suppliers happy.

What to ask, how to see which products will run out, and ways to cover the gap.

Why suppliers set minimums, what to offer instead, and an email you can adapt.

The questions and a ready-to-send email that get you a supplier's real lead time, not their best case.

What still works after the shutdown, what to save first, and how to check your files before the window closes.

A step-by-step walkthrough of Shopify's built-in purchase orders, from setting up suppliers to receiving stock.

The landed cost formula, two ways to split freight and duty, and a worked example you can follow.

Key 2026 dates, order-by deadlines for common lead times, and an eight-step plan for holiday stock.

The reorder point formula, how to size safety stock, and a worked example with real numbers.

Stop guessing your next reorder

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