diff --git a/app/Helpers/Report/ReportHelper.php b/app/Helpers/Report/ReportHelper.php
index e6472824c1..37222d4123 100644
--- a/app/Helpers/Report/ReportHelper.php
+++ b/app/Helpers/Report/ReportHelper.php
@@ -60,9 +60,10 @@ class ReportHelper implements ReportHelperInterface
 
 
         $accounts = $this->query->getAllAccounts($date, $end, $shared);
-        $start    = 0;
-        $end      = 0;
-        $diff     = 0;
+        $start    = '0';
+        $end      = '0';
+        $diff     = '0';
+        bcscale(2);
 
         // remove cash account, if any:
         $accounts = $accounts->filter(
@@ -77,9 +78,9 @@ class ReportHelper implements ReportHelperInterface
 
         // summarize:
         foreach ($accounts as $account) {
-            $start += $account->startBalance;
-            $end += $account->endBalance;
-            $diff += ($account->endBalance - $account->startBalance);
+            $start = bcadd($start, $account->startBalance);
+            $end   = bcadd($end, $account->endBalance);
+            $diff  = bcadd($diff, ($account->endBalance - $account->startBalance));
         }
 
         $object = new AccountCollection;
diff --git a/app/Http/Controllers/AccountController.php b/app/Http/Controllers/AccountController.php
index 1a589b9f4c..0a904f593c 100644
--- a/app/Http/Controllers/AccountController.php
+++ b/app/Http/Controllers/AccountController.php
@@ -205,7 +205,8 @@ class AccountController extends Controller
             'openingBalanceCurrency' => intval($request->input('balance_currency_id')),
 
         ];
-        $account     = $repository->store($accountData);
+
+        $account = $repository->store($accountData);
 
         Session::flash('success', 'New account "' . $account->name . '" stored!');
         Preferences::mark();
diff --git a/app/Http/Controllers/Chart/BudgetController.php b/app/Http/Controllers/Chart/BudgetController.php
index 45bd8a2a44..ad7192415d 100644
--- a/app/Http/Controllers/Chart/BudgetController.php
+++ b/app/Http/Controllers/Chart/BudgetController.php
@@ -93,6 +93,7 @@ class BudgetController extends Controller
     {
         $start = clone $repetition->startdate;
         $end   = $repetition->enddate;
+        bcscale(2);
 
         // chart properties for cache:
         $cache = new CacheProperties();
@@ -113,8 +114,8 @@ class BudgetController extends Controller
             /*
              * Sum of expenses on this day:
              */
-            $sum = $repository->expensesOnDayCorrected($budget, $start);
-            $amount += $sum;
+            $sum    = $repository->expensesOnDayCorrected($budget, $start);
+            $amount = bcadd($amount, $sum);
             $entries->push([clone $start, $amount]);
             $start->addDay();
         }
diff --git a/app/Http/Controllers/HomeController.php b/app/Http/Controllers/HomeController.php
index a0fb4c0e09..78db6cc105 100644
--- a/app/Http/Controllers/HomeController.php
+++ b/app/Http/Controllers/HomeController.php
@@ -70,6 +70,7 @@ class HomeController extends Controller
     {
         $types = Config::get('firefly.accountTypesByIdentifier.asset');
         $count = $repository->countAccounts($types);
+        bcscale(2);
 
 
         if ($count == 0) {
@@ -92,7 +93,7 @@ class HomeController extends Controller
 
         $savingsTotal = 0;
         foreach ($savings as $savingAccount) {
-            $savingsTotal += Steam::balance($savingAccount, $end);
+            $savingsTotal = bcadd($savingsTotal, Steam::balance($savingAccount, $end));
         }
 
         $sum = $repository->sumOfEverything();
diff --git a/app/Http/Controllers/JsonController.php b/app/Http/Controllers/JsonController.php
index 6dafae3266..e543534751 100644
--- a/app/Http/Controllers/JsonController.php
+++ b/app/Http/Controllers/JsonController.php
@@ -36,6 +36,7 @@ class JsonController extends Controller
     {
         $start = Session::get('start', Carbon::now()->startOfMonth());
         $end   = Session::get('end', Carbon::now()->endOfMonth());
+        bcscale(2);
 
         // works for json too!
         $cache = new CacheProperties;
@@ -54,7 +55,7 @@ class JsonController extends Controller
 
         /** @var Bill $bill */
         foreach ($bills as $bill) {
-            $amount += $repository->billPaymentsInRange($bill, $start, $end);
+            $amount = bcadd($amount, $repository->billPaymentsInRange($bill, $start, $end));
         }
         unset($bill, $bills);
 
@@ -69,7 +70,7 @@ class JsonController extends Controller
             if ($balance == 0) {
                 // find a transfer TO the credit card which should account for
                 // anything paid. If not, the CC is not yet used.
-                $amount += $accountRepository->getTransfersInRange($creditCard, $start, $end)->sum('amount');
+                $amount = bcadd($amount, $accountRepository->getTransfersInRange($creditCard, $start, $end)->sum('amount'));
             }
         }
         $data = ['box' => 'bills-paid', 'amount' => Amount::format($amount, false), 'amount_raw' => $amount];
@@ -90,6 +91,7 @@ class JsonController extends Controller
         $amount = 0;
         $start  = Session::get('start', Carbon::now()->startOfMonth());
         $end    = Session::get('end', Carbon::now()->endOfMonth());
+        bcscale(2);
 
         // works for json too!
         $cache = new CacheProperties;
@@ -131,7 +133,7 @@ class JsonController extends Controller
         /** @var Bill $entry */
         foreach ($unpaid as $entry) {
             $current = ($entry[0]->amount_max + $entry[0]->amount_min) / 2;
-            $amount += $current;
+            $amount = bcadd($amount, $current);
         }
 
         $data = ['box' => 'bills-unpaid', 'amount' => Amount::format($amount, false), 'amount_raw' => $amount];
diff --git a/app/Http/Controllers/PiggyBankController.php b/app/Http/Controllers/PiggyBankController.php
index 00900f9d08..4f5fd75996 100644
--- a/app/Http/Controllers/PiggyBankController.php
+++ b/app/Http/Controllers/PiggyBankController.php
@@ -166,6 +166,7 @@ class PiggyBankController extends Controller
         /** @var Collection $piggyBanks */
         $piggyBanks = $piggyRepository->getPiggyBanks();
         $end        = Session::get('end', Carbon::now()->endOfMonth());
+        bcscale(2);
 
         $accounts = [];
         /** @var PiggyBank $piggyBank */
@@ -188,9 +189,9 @@ class PiggyBankController extends Controller
                     'leftToSave'        => $piggyBank->leftToSave
                 ];
             } else {
-                $accounts[$account->id]['sumOfSaved'] += $piggyBank->savedSoFar;
-                $accounts[$account->id]['sumOfTargets'] += floatval($piggyBank->targetamount);
-                $accounts[$account->id]['leftToSave'] += $piggyBank->leftToSave;
+                $accounts[$account->id]['sumOfSaved']   = bcadd($accounts[$account->id]['sumOfSaved'], $piggyBank->savedSoFar);
+                $accounts[$account->id]['sumOfTargets'] = bcadd($accounts[$account->id]['sumOfTargets'], $piggyBank->targetamount);
+                $accounts[$account->id]['leftToSave']   = bcadd($accounts[$account->id]['leftToSave'], $piggyBank->leftToSave);
             }
         }
 
@@ -230,10 +231,11 @@ class PiggyBankController extends Controller
         $savedSoFar    = $piggyBank->currentRelevantRep()->currentamount;
         $leftToSave    = $piggyBank->targetamount - $savedSoFar;
         $maxAmount     = round(min($leftOnAccount, $leftToSave), 2);
+        bcscale(2);
 
         if ($amount <= $maxAmount) {
-            $repetition = $piggyBank->currentRelevantRep();
-            $repetition->currentamount += $amount;
+            $repetition                = $piggyBank->currentRelevantRep();
+            $repetition->currentamount = bcadd($repetition->currentamount, $amount);
             $repetition->save();
 
             // create event