diff --git a/docker/ss-atlas/internal/handlers/subscription.go b/docker/ss-atlas/internal/handlers/subscription.go
index 87c3138..918a97d 100644
--- a/docker/ss-atlas/internal/handlers/subscription.go
+++ b/docker/ss-atlas/internal/handlers/subscription.go
@@ -36,7 +36,8 @@ func (a *App) handleLanding(w http.ResponseWriter, r *http.Request) {
 	tier := pricing.ForCustomer(count, a.cfg.FreeTierLimit, a.cfg.YearTierLimit)
 
 	useForm := a.cfg.StripePriceID != "" || a.cfg.StripePriceIDFree != "" ||
-		a.cfg.StripePriceIDYear != "" || a.cfg.StripePriceIDMonth200 != ""
+		a.cfg.StripePriceIDYear != "" || a.cfg.StripePriceIDMonth100 != "" ||
+		a.cfg.StripePriceIDMonth200 != ""
 	data := map[string]any{
 		"AppURL":            a.cfg.AppURL,
 		"Commit":            version.Commit,
@@ -89,7 +90,7 @@ func (a *App) handleCreateCheckout(w http.ResponseWriter, r *http.Request) {
 	sess, err := a.stripe.CreateCheckoutSession(email, domain, phone, count)
 	if err != nil {
 		if errors.Is(err, stripe.ErrNoPriceForTier) {
-			http.Error(w, "pricing not configured for current tier", http.StatusServiceUnavailable)
+			http.Error(w, "pricing not configured for current tier — set STRIPE_PRICE_ID or tier prices in env", http.StatusServiceUnavailable)
 			return
 		}
 		log.Printf("stripe checkout error: %v", err)
@@ -213,7 +214,7 @@ func (a *App) handleResubscribe(w http.ResponseWriter, r *http.Request) {
 	sess, err := a.stripe.CreateCheckoutForCustomer(customerID, count)
 	if err != nil {
 		if errors.Is(err, stripe.ErrNoPriceForTier) {
-			http.Error(w, "pricing not configured for current tier", http.StatusServiceUnavailable)
+			http.Error(w, "pricing not configured for current tier — set STRIPE_PRICE_ID or tier prices in env", http.StatusServiceUnavailable)
 			return
 		}
 		log.Printf("stripe resubscribe error: %v", err)
diff --git a/docker/ss-atlas/internal/stripe/client.go b/docker/ss-atlas/internal/stripe/client.go
index 14b06b2..6448cf0 100644
--- a/docker/ss-atlas/internal/stripe/client.go
+++ b/docker/ss-atlas/internal/stripe/client.go
@@ -45,6 +45,9 @@ func (c *Client) priceForTier(t pricing.Tier) string {
 		if c.cfg.StripePriceIDMonth200 != "" {
 			return c.cfg.StripePriceIDMonth200
 		}
+		if c.cfg.StripePriceIDMonth100 != "" {
+			return c.cfg.StripePriceIDMonth100
+		}
 	}
 	return c.cfg.StripePriceID
 }
@@ -53,6 +56,8 @@ func (c *Client) CreateCheckoutSession(email, customerDomain, customerPhone stri
 	t := pricing.ForCustomer(customerCount, c.cfg.FreeTierLimit, c.cfg.YearTierLimit)
 	priceID := c.priceForTier(t)
 	if priceID == "" {
+		log.Printf("stripe: no price for tier %d (count=%d freeLimit=%d yearLimit=%d); set STRIPE_PRICE_ID or tier-specific price",
+			t, customerCount, c.cfg.FreeTierLimit, c.cfg.YearTierLimit)
 		return nil, ErrNoPriceForTier
 	}
 
@@ -81,6 +86,7 @@ func (c *Client) CreateCheckoutForCustomer(customerID string, customerCount int)
 	t := pricing.ForCustomer(customerCount, c.cfg.FreeTierLimit, c.cfg.YearTierLimit)
 	priceID := c.priceForTier(t)
 	if priceID == "" {
+		log.Printf("stripe: no price for tier %d (count=%d); set STRIPE_PRICE_ID or tier-specific price", t, customerCount)
 		return nil, ErrNoPriceForTier
 	}