diff --git a/internal/handler/download.go b/internal/handler/download.go
index 7da6e1e..cbb6ce1 100644
--- a/internal/handler/download.go
+++ b/internal/handler/download.go
@@ -113,11 +113,13 @@ func (h *Handler) handleURLInput(ctx context.Context, chatID int64, text string,
 		return
 	}
 
-	// Reject if user has already exhausted quota (used >= limit) with a minimum threshold.
+	// Reject if user has already exhausted quota (limit of 0 = unlimited).
 	q, err := h.Repo.GetOrCreateQuotas(userID)
 	if err == nil {
 		q = h.resetQuotasIfNeeded(q)
-		if q.DailyUsedMB >= q.DailyLimitMB || q.WeeklyUsedMB >= q.WeeklyLimitMB || q.MonthlyUsedMB >= q.MonthlyLimitMB {
+		if (q.DailyLimitMB > 0 && q.DailyUsedMB >= q.DailyLimitMB) ||
+			(q.WeeklyLimitMB > 0 && q.WeeklyUsedMB >= q.WeeklyLimitMB) ||
+			(q.MonthlyLimitMB > 0 && q.MonthlyUsedMB >= q.MonthlyLimitMB) {
 			h.sendText(ctx, chatID, fmt.Sprintf(
 				"Quota exceeded. Daily: %d/%d MB, Weekly: %d/%d MB, Monthly: %d/%d MB.",
 				q.DailyUsedMB, q.DailyLimitMB, q.WeeklyUsedMB, q.WeeklyLimitMB, q.MonthlyUsedMB, q.MonthlyLimitMB))