Can I set a minimum order value before the fixed discount applies?

Yes. Under Minimum requirement in Discount Configuration, choose Minimum purchase amount and enter the threshold, or choose Minimum quantity of items to require a number of items instead.

What happens to the discount code after the promo ends?

PromoOS marks the promo as Ended and the code stops applying to new orders. The code itself stays in your Shopify admin for historical reference; remove it manually if you want it gone.

How-to guide

How to Set Up a Fixed Amount ($ Off) Discount on Shopify

A fixed amount discount is a Discount Code promo with Discount Type set to Fixed Amount, a flat $5, $10 or $25 off. This guide creates $10 Off Hoodies, code HOODIE10, on the Hoodies collection with a $50 minimum purchase.

6 steps About 3 min

Install PromoOS free Skip to the steps

When to Use It

Use a fixed amount when a percentage either gives away too much on high-priced items or means nothing on low-priced ones. A flat number is also easier to say in a banner or an email.

Offers on a narrow price band, such as one collection
Threshold deals like $10 off orders over $50
Promos where the headline needs to be a number, not a percent

Set It Up in 6 Steps

Open Create Promo from the Dashboard
Sign in to PromoOS and click Create Promo in the header. The Create Promotion dialog opens on the Promo Type step.
The Dashboard with Create Promo in the top right
Choose Discount Code
The first step asks how the promo should apply. Choose Discount Code: shoppers enter a code at checkout, and product-page prices stay unchanged until then. You can add an optional revenue goal here, then click Next.
Promo Type step with Discount Code selected
Name it and set the dates
In Basic Information, enter the Promo Name, leave Promo Type as Discount, and set the Start Date, End Date and times. Those dates are the schedule: PromoOS activates the code at the start and stops it at the end.
Setup step with the name, dates, fixed amount and collection filled in
Choose Fixed Amount and enter 10
In Discount Configuration, click Fixed Amount ($) and type 10 in Discount Value. Under Minimum requirement, choose Minimum purchase amount and enter 50 so the code only works on orders of $50 or more. Keep Requires a code and type HOODIE10.
Discount Configuration with Fixed Amount, 10, a $50 minimum and the code
Choose the Hoodies collection
In Target Audience, click Specific Collections, then Select Collections and pick Hoodies. The chosen collection appears as a chip under the button. The code applies only to items in that collection.
Target Audience set to Specific Collections with Hoodies selected
Add a banner, then click Create Promo
The Placements step is optional. Toggle an Announcement Bar or Hero Section on any store page to show $10 Off Hoodies on your storefront, or leave every placement off. Click Create Promo. A future start date saves the promo as Scheduled and PromoOS activates it on time.
Note
Banners need the PromoOS theme block added to your theme once. The Placements step links to the instructions, and the Help Center walks through it.
Placements step before any banner is added, with Create Promo ready