diff --git a/index.html b/index.html
index b7a224504..aeb16d94b 100644
--- a/index.html
+++ b/index.html
@@ -653,9 +653,10 @@
                     <label for="amount">Amount
                       <small ng-hide="!sendForm.amount.$pristine">required</small>
                       <small class="is-valid" ng-show="!sendForm.amount.$invalid && !sendForm.amount.$pristine">valid!</small>
-                      <small class="has-error" ng-show="sendForm.amount.$invalid && !sendForm.amount.$pristine">
-                      not valid.</small>
-                      <small ng-show="notEnoughAmount">{{notEnoughAmount}}</small>
+                      <small class="has-error" ng-show="sendForm.amount.$invalid && !sendForm.amount.$pristine && !notEnoughAmount">
+                        not valid
+                      </small>
+                      <small ng-show="notEnoughAmount">Insufficient funds!</small>
                     </label>
                     <div class="small-9 columns">
                       <input type="number" id="amount" ng-disabled="loading"
diff --git a/js/directives.js b/js/directives.js
index 0a46db2c6..99ad32830 100644
--- a/js/directives.js
+++ b/js/directives.js
@@ -39,16 +39,18 @@ angular.module('copayApp.directives')
   ])
   .directive('enoughAmount', ['$rootScope',
     function($rootScope) {
+      var bitcore = require('bitcore');
+      var feeSat = bitcore.TransactionBuilder.FEE_PER_1000B_SAT;
       return {
         require: 'ngModel',
         link: function(scope, element, attrs, ctrl) {
           var val = function(value) {
-            var vStr = new String(value);
-            var vNum = Number(vStr);
+            var availableBalanceNum = ($rootScope.availableBalance * bitcore.util.COIN).toFixed(0);
+            var vNum = Number((value * bitcore.util.COIN).toFixed(0)) + feeSat;
             if (typeof vNum == "number" && vNum > 0) {
-              if ($rootScope.availableBalance <= vNum) {
+              if (availableBalanceNum < vNum) {
                 ctrl.$setValidity('enoughAmount', false);
-                scope.notEnoughAmount = 'Insufficient funds!';
+                scope.notEnoughAmount = true;
               } else {
                 ctrl.$setValidity('enoughAmount', true);
                 scope.notEnoughAmount = null;
diff --git a/test/unit/directives/directivesSpec.js b/test/unit/directives/directivesSpec.js
index f6bc00bc0..b4162aae2 100644
--- a/test/unit/directives/directivesSpec.js
+++ b/test/unit/directives/directivesSpec.js
@@ -35,7 +35,7 @@ describe("Unit: Testing Directives", function() {
   describe('Validate Amount', function() {
     beforeEach(inject(function($compile, $rootScope) {
       $scope = $rootScope;
-      $rootScope.availableBalance = 2;
+      $rootScope.availableBalance = 0.101;
       var element = angular.element(
         '<form name="form">' +
         '<input type="number" id="amount" name="amount" placeholder="Amount" ng-model="amount" min="0.0001" max="10000000" enough-amount required>' +
@@ -47,19 +47,21 @@ describe("Unit: Testing Directives", function() {
       form = $scope.form;
     }));
 
-    it('should validate between min and max value', function() {
-      form.amount.$setViewValue(1.2);
+    it('should validate', function() {
+      form.amount.$setViewValue(0.1);
+      expect(form.amount.$invalid).to.equal(false);
+      form.amount.$setViewValue(0.1009);
       expect(form.amount.$invalid).to.equal(false);
     });
-    it('should not validate between min and max value', function() {
+    it('should not validate', function() {
       form.amount.$setViewValue(0);
       expect(form.amount.$invalid).to.equal(true);
-      form.amount.$setViewValue(9999999999999);
+      form.amount.$setViewValue(9999999999);
       expect(form.amount.$invalid).to.equal(true);
-    });
-    it('should not validate because not enough amount', function() {
       form.amount.$setViewValue(2.1);
       expect(form.amount.$invalid).to.equal(true);
+      form.amount.$setViewValue(0.10091);
+      expect(form.amount.$invalid).to.equal(true);
     });
   });