diff --git a/apps/api/src/lib/billing/upsert-stripe-pricing.ts b/apps/api/src/lib/billing/upsert-stripe-pricing.ts
index 13b73420..96d3a722 100644
--- a/apps/api/src/lib/billing/upsert-stripe-pricing.ts
+++ b/apps/api/src/lib/billing/upsert-stripe-pricing.ts
@@ -182,11 +182,6 @@ export async function upsertStripePricing({
             400,
             `Invalid pricing plan metric "${pricingPlanLineItemSlug}" for pricing plan "${pricingPlanSlug}": tiered billing schemes must have at least one tier.`
           )
-          assert(
-            !pricingPlanLineItem.transformQuantity,
-            400,
-            `Invalid pricing plan metric "${pricingPlanLineItemSlug}" for pricing plan "${pricingPlanSlug}": tiered billing schemes cannot have transformQuantity.`
-          )
 
           priceParams.tiers_mode = pricingPlanLineItem.tiersMode
           priceParams.tiers = pricingPlanLineItem.tiers.map((tierData) => {
@@ -215,11 +210,6 @@ export async function upsertStripePricing({
             400,
             `Invalid pricing plan metric "${pricingPlanLineItemSlug}" for pricing plan "${pricingPlanSlug}": unitAmount is required for per_unit billing schemes.`
           )
-          assert(
-            !(pricingPlanLineItem as any).tiers,
-            400,
-            `Invalid pricing plan metric "${pricingPlanLineItemSlug}" for pricing plan "${pricingPlanSlug}": per_unit billing schemes cannot have tiers.`
-          )
 
           priceParams.unit_amount_decimal =
             pricingPlanLineItem.unitAmount.toFixed(12)
diff --git a/packages/platform/src/validate-pricing.ts b/packages/platform/src/validate-pricing.ts
index 23dcf1c9..8665aaf6 100644
--- a/packages/platform/src/validate-pricing.ts
+++ b/packages/platform/src/validate-pricing.ts
@@ -170,12 +170,11 @@ export function validatePricing({
               `Invalid PricingPlan "${pricingPlan.slug}": metered LineItem "${lineItem.slug}" must specify a valid "tiersMode" when using "tiered" billing scheme.`
             )
 
-            // TODO: Not sure if this is a valid requirement or not. If it is, update
-            // the corresponding type in the schemas package.
-            // assert(
-            //   lineItem.transformQuantity === undefined,
-            //   `Invalid pricingPlan "${pricingPlan.slug}": metered LineItem "${lineItem.slug}" must not specify "transformQuantity" when using "tiered" billing scheme.`
-            // )
+            // TODO: Not sure if this is a valid requirement or not.
+            assert(
+              (lineItem as any).transformQuantity === undefined,
+              `Invalid pricingPlan "${pricingPlan.slug}": metered LineItem "${lineItem.slug}" must not specify "transformQuantity" when using "tiered" billing scheme.`
+            )
             break
 
           default:
diff --git a/packages/types/src/pricing.ts b/packages/types/src/pricing.ts
index 9a3ede84..dfa7a20c 100644
--- a/packages/types/src/pricing.ts
+++ b/packages/types/src/pricing.ts
@@ -225,7 +225,7 @@ export const pricingPlanMeteredLineItemSchema =
        *
        * This field requires `billingScheme` to be set to `tiered`.
        */
-      tiers: z.array(pricingPlanTierSchema).optional(),
+      tiers: z.array(pricingPlanTierSchema).nonempty().optional(),
 
       // TODO: add support for tiered rate limits?