diff --git a/apps/payment/models.py b/apps/payment/models.py
index b5baefd9..fc3c81cc 100644
--- a/apps/payment/models.py
+++ b/apps/payment/models.py
@@ -1,11 +1,11 @@
 import arrow
 import short_url
-from django.db.models import Func, F
 
 from paymentwall import Pingback
 from polymorphic.models import PolymorphicModel
 from polymorphic.managers import PolymorphicManager
 
+from django.db.models import Func, F
 from django.db import models
 from django.contrib.auth import get_user_model
 from django.contrib.postgres.fields import ArrayField, JSONField
@@ -120,6 +120,10 @@ class Payment(PolymorphicModel):
 
     @classmethod
     def add_months(cls, sourcedate, months=1):
+        # FIXME после мая 2019 убрать?
+        # Если хотят купить школу в мае, то оплатить ее можно только до 31 мая, потом школа закроется
+        if sourcedate.month == 5:
+            return sourcedate.replace(day=31)
         result = arrow.get(sourcedate, settings.TIME_ZONE).shift(months=months)
         if months == 1:
             if (sourcedate.month == 2 and sourcedate.day >= 28) or (sourcedate.day == 31 and result.day <= 30) \
@@ -179,9 +183,18 @@ class Payment(PolymorphicModel):
                     price += ss.month_price // all_weekdays_count.get(ss.weekday, 0) * weekdays_count.get(
                         ss.weekday, 0)
             else:
-                price = school_schedules.aggregate(
-                    models.Sum('month_price'),
-                ).get('month_price__sum', 0)
+                # FIXME после мая 2019 убрать?
+                # Если хотят купить школу в мае, то оплатить ее можно только до 31 мая, потом школа закроется
+                if date_start.month == 5:
+                    weekdays_count = weekdays_in_date_range(date_start, date_end)
+                    all_weekdays_count = weekdays_in_date_range(date_start.replace(day=1), date_end)
+                    for ss in school_schedules:
+                        price += ss.month_price // all_weekdays_count.get(ss.weekday, 0) * weekdays_count.get(
+                            ss.weekday, 0)
+                else:
+                    price = school_schedules.aggregate(
+                        models.Sum('month_price'),
+                    ).get('month_price__sum', 0)
             if not (payment and payment.id) and price >= config.SERVICE_DISCOUNT_MIN_AMOUNT:
                 discount = config.SERVICE_DISCOUNT
         amount = price - discount