diff --git a/src/client/stores/CalculationStore/Effects/lib/tools.js b/src/client/stores/CalculationStore/Effects/lib/tools.js
index 0e9ec4a..4952e5e 100644
--- a/src/client/stores/CalculationStore/Effects/lib/tools.js
+++ b/src/client/stores/CalculationStore/Effects/lib/tools.js
@@ -1,4 +1,4 @@
-export function calcSupplierPrice(
+export function calcPrice(
   isocurrencycode,
   leaseObjectPrice,
   evo_currencychange,
@@ -26,7 +26,7 @@ export const calculatePerc = calculationStore => (
     ?.find(x => x.evo_ref_transactioncurrency === supplierCurrencyId);
   const evo_currencychangeValue =
     (evo_currencychange && evo_currencychange.evo_currencychange) || 0;
-  let price = calcSupplierPrice(
+  let price = calcPrice(
     supplierCurrency?.isocurrencycode,
     parseFloat(leaseObjectPrice),
     evo_currencychangeValue,
@@ -50,7 +50,7 @@ export const calculateRub = calculationStore => (
     ?.find(x => x.evo_ref_transactioncurrency === supplierCurrencyId);
   const evo_currencychangeValue =
     (evo_currencychange && evo_currencychange.evo_currencychange) || 0;
-  let price = calcSupplierPrice(
+  let price = calcPrice(
     supplierCurrency?.isocurrencycode,
     parseFloat(leaseObjectPrice),
     evo_currencychangeValue,
diff --git a/src/client/stores/CalculationStore/Effects/reaction.ts b/src/client/stores/CalculationStore/Effects/reaction.ts
index 46e2275..986c09d 100644
--- a/src/client/stores/CalculationStore/Effects/reaction.ts
+++ b/src/client/stores/CalculationStore/Effects/reaction.ts
@@ -2,7 +2,7 @@ import { openNotification } from 'client/Elements/Notification';
 import CalculationService from 'client/services/CalculationService';
 import { IReactionEffect } from 'core/types/effect';
 import { Status } from 'core/types/statuses';
-import { calculatePerc, calculateRub } from './lib/tools';
+import { calcPrice, calculatePerc, calculateRub } from './lib/tools';
 
 const reactionEffects: IReactionEffect[] = [
   calculationStore => ({
@@ -1725,6 +1725,56 @@ const reactionEffects: IReactionEffect[] = [
       );
     },
   }),
+
+  calculationStore => ({
+    expression: () => {
+      const {
+        recalcWithRevision,
+        supplierCurrency,
+        supplierDiscountRub,
+        supplierDiscountPerc,
+        leaseObjectPrice,
+      } = calculationStore.values;
+      return [
+        recalcWithRevision,
+        supplierCurrency,
+        supplierDiscountRub,
+        supplierDiscountPerc,
+        leaseObjectPrice,
+      ];
+    },
+    effect: ([
+      recalcWithRevision,
+      supplierCurrencyId,
+      supplierDiscountRub,
+      supplierDiscountPerc,
+      leaseObjectPrice,
+    ]) => {
+      if (recalcWithRevision === true) {
+        return;
+      }
+      const supplierCurrency = calculationStore
+        .getOptions('selectSupplierCurrency')
+        .find(x => x.transactioncurrencyid === supplierCurrencyId);
+      const evo_currencychange = calculationStore
+        .getStaticData('evo_currencychange')
+        ?.find(x => x.evo_ref_transactioncurrency === supplierCurrencyId);
+      const evo_currencychangeValue =
+        (evo_currencychange && evo_currencychange.evo_currencychange) || 0;
+      let price = calcPrice(
+        supplierCurrency?.isocurrencycode,
+        leaseObjectPrice,
+        evo_currencychangeValue,
+      );
+
+      let maxPriceChange =
+        price - supplierDiscountRub < 800000
+          ? price - supplierDiscountRub + 50000
+          : (price - supplierDiscountRub) * 1.05;
+
+      calculationStore.setValue('maxPriceChange', maxPriceChange);
+    },
+  }),
 ];
 
 export default reactionEffects;