You might receive a promotion code from a Google partner that gives you a discount price on a Google service subscription. These promo codes are good when you select a billing plan through Google's affiliate program. If you have a promotion code, enter it when you select your billing plan. If you do not enter it at that time, you can NOT add it later.
Important: To receive your discount, be sure to enter your promotion code now. You can’t enter it later.
More information on Google Workspace (G Suite) Promo Codes from Google available on Google's support site.
Through our Google Workspace (G Suite) partner, Apps Admins offers a simplified system for discounts on G Suite. Generally there are two promo codes offered: One for a free month (taken as a monthly discount) and one other seasonal discount.
To Redeem a promo code for Google Workspace (G Suite) with Apps Admins you need to have started a G Suite Free Trial with Apps Admins on appsadmins.com. Here's the link: Google Workspace (G Suite) Free Trial with Apps Admins