diff --git a/.gitignore b/.gitignore
index 57071a2..72f2e9d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,4 +2,5 @@
 /vendor
 /composer.lock
 /tmp
-/.php_cs.cache
\ No newline at end of file
+/.php_cs.cache
+/.phpunit.result.cache
\ No newline at end of file
diff --git a/src/Config/AbstractConfiguration.php b/src/Config/AbstractConfiguration.php
new file mode 100644
index 0000000..e0b72a1
--- /dev/null
+++ b/src/Config/AbstractConfiguration.php
@@ -0,0 +1,26 @@
+<?php
+
+namespace rikudou\EuQrPayment\Config;
+
+abstract class AbstractConfiguration implements ConfigurationInterface
+{
+    public function getVersion(): string
+    {
+        return '002';
+    }
+
+    public function getCustomData(): iterable
+    {
+        return [];
+    }
+
+    public function getAmountPrecision(): ?int
+    {
+        return null;
+    }
+
+    public function getDueDateHandler(): ?DueDateHandlerInterface
+    {
+        return null;
+    }
+}
diff --git a/src/Config/Configuration.php b/src/Config/Configuration.php
new file mode 100644
index 0000000..95cffe1
--- /dev/null
+++ b/src/Config/Configuration.php
@@ -0,0 +1,7 @@
+<?php
+
+namespace rikudou\EuQrPayment\Config;
+
+final class Configuration extends AbstractConfiguration
+{
+}
diff --git a/src/Config/ConfigurationInterface.php b/src/Config/ConfigurationInterface.php
new file mode 100644
index 0000000..099b53c
--- /dev/null
+++ b/src/Config/ConfigurationInterface.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace rikudou\EuQrPayment\Config;
+
+interface ConfigurationInterface
+{
+    /**
+     * The standard version like 001 or 002
+     *
+     * @return string
+     */
+    public function getVersion(): string;
+
+    /**
+     * Additional custom data to be appended at the generated string
+     *
+     * @return iterable<string>
+     */
+    public function getCustomData(): iterable;
+
+    /**
+     * The precision to be applied to the amount
+     *
+     * @return int|null
+     */
+    public function getAmountPrecision(): ?int;
+
+    /**
+     * The standard does not support setting due date, you can use this to set your own non-standard implementation
+     *
+     * @return DueDateHandlerInterface|null
+     */
+    public function getDueDateHandler(): ?DueDateHandlerInterface;
+}
diff --git a/src/Config/DueDateHandlerInterface.php b/src/Config/DueDateHandlerInterface.php
new file mode 100644
index 0000000..cfd64ea
--- /dev/null
+++ b/src/Config/DueDateHandlerInterface.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace rikudou\EuQrPayment\Config;
+
+use DateTimeInterface;
+
+interface DueDateHandlerInterface
+{
+    public function setDueDate(DateTimeInterface $dueDate): void;
+
+    public function getDueDate(): DateTimeInterface;
+}
diff --git a/src/QrPayment.php b/src/QrPayment.php
index db388d9..173acaf 100644
--- a/src/QrPayment.php
+++ b/src/QrPayment.php
@@ -4,6 +4,8 @@
 
 use DateTimeInterface;
 use Endroid\QrCode\QrCode;
+use rikudou\EuQrPayment\Config\Configuration;
+use rikudou\EuQrPayment\Config\ConfigurationInterface;
 use rikudou\EuQrPayment\Exceptions\InvalidIbanException;
 use rikudou\EuQrPayment\Exceptions\InvalidOptionException;
 use rikudou\EuQrPayment\Exceptions\UnsupportedMethodException;
@@ -60,10 +62,15 @@ final class QrPayment implements QrPaymentInterface
      */
     private $currency = 'EUR';
 
+    /**
+     * @var ConfigurationInterface
+     */
+    private $configuration;
+
     /**
      * @param string|IbanInterface $iban
      */
-    public function __construct($iban)
+    public function __construct($iban, ?ConfigurationInterface $configuration = null)
     {
         if (is_string($iban)) {
             $iban = new IBAN($iban);
@@ -71,7 +78,11 @@ public function __construct($iban)
         if (!$iban instanceof IbanInterface) {
             throw new \InvalidArgumentException('The IBAN must be a string or ' . IbanInterface::class . ', ' . Utils::getType($iban) . ' given');
         }
+        if ($configuration === null) {
+            $configuration = new Configuration();
+        }
         $this->iban = $iban;
+        $this->configuration = $configuration;
     }
 
     /**
@@ -318,17 +329,28 @@ public function getQrString(): string
             }
         }
 
+        if ($this->getAmount()) {
+            $amount = $this->configuration->getAmountPrecision() !== null
+                ? number_format($this->getAmount(), $this->configuration->getAmountPrecision(), '.', '')
+                : $this->getAmount();
+        } else {
+            $amount = '';
+        }
+
         $result[] = 'BCD'; // the service tag
-        $result[] = '002'; // version
+        $result[] = $this->configuration->getVersion();
         $result[] = $this->getCharacterSet();
         $result[] = 'SCT'; // identification
         $result[] = $this->getBic();
         $result[] = $this->getBeneficiaryName();
         $result[] = $this->getIban()->asString();
-        $result[] = $this->getAmount() ? $this->getCurrency() . $this->getAmount() : '';
+        $result[] = $amount ? $this->getCurrency() . $amount : '';
         $result[] = $this->getPurpose();
         $result[] = $this->getRemittanceText();
         $result[] = $this->getInformation();
+        foreach ($this->configuration->getCustomData() as $customDatum) {
+            $result[] = $customDatum;
+        }
 
         $result = implode("\n", $result);
 
@@ -378,11 +400,19 @@ public function setOptions(array $options)
 
     public function setDueDate(DateTimeInterface $dueDate)
     {
+        if ($handler = $this->configuration->getDueDateHandler()) {
+            $handler->setDueDate($dueDate);
+
+            return $this;
+        }
         throw new UnsupportedMethodException('The European standard does not support setting due date');
     }
 
     public function getDueDate(): DateTimeInterface
     {
+        if ($handler = $this->configuration->getDueDateHandler()) {
+            return $handler->getDueDate();
+        }
         throw new UnsupportedMethodException('The European standard does not support setting due date');
     }
 
diff --git a/tests/Config/AbstractConfigurationTest.php b/tests/Config/AbstractConfigurationTest.php
new file mode 100644
index 0000000..315948c
--- /dev/null
+++ b/tests/Config/AbstractConfigurationTest.php
@@ -0,0 +1,192 @@
+<?php
+
+namespace rikudou\EuQrPayment\Tests\Config;
+
+use DateTimeImmutable;
+use DateTimeInterface;
+use rikudou\EuQrPayment\Config\AbstractConfiguration;
+use PHPUnit\Framework\TestCase;
+use rikudou\EuQrPayment\Config\DueDateHandlerInterface;
+use rikudou\EuQrPayment\Exceptions\UnsupportedMethodException;
+use rikudou\EuQrPayment\Iban\CzechIbanAdapter;
+use rikudou\EuQrPayment\QrPayment;
+
+class AbstractConfigurationTest extends TestCase
+{
+    public function testGetVersion()
+    {
+        // test default
+        $instance = $this->getInstance();
+        self::assertEquals('002', $this->getLine($instance, 1));
+
+        $config = new class extends AbstractConfiguration {
+            public function getVersion(): string
+            {
+                return '001';
+            }
+        };
+        $instance = $this->getInstance($config);
+        self::assertEquals('001', $this->getLine($instance, 1));
+
+        $config = new class extends AbstractConfiguration {
+            public function getVersion(): string
+            {
+                return '002';
+            }
+        };
+        $instance = $this->getInstance($config);
+        self::assertEquals('002', $this->getLine($instance, 1));
+
+        $config = new class extends AbstractConfiguration {
+            public function getVersion(): string
+            {
+                return '003';
+            }
+        };
+        $instance = $this->getInstance($config);
+        self::assertEquals('003', $this->getLine($instance, 1));
+    }
+
+    public function testGetCustomData()
+    {
+        // test default
+        $instance = $this->getInstance();
+        self::assertCount(11, $this->getLines($instance));
+
+        $config = new class extends AbstractConfiguration {
+            public function getCustomData(): iterable
+            {
+                yield 'A';
+                yield 'B';
+            }
+        };
+        $instance = $this->getInstance($config);
+        self::assertCount(13, $this->getLines($instance));
+        self::assertEquals('A', $this->getLine($instance, 11));
+        self::assertEquals('B', $this->getLine($instance, 12));
+    }
+
+    public function testGetAmountPrecision()
+    {
+        // test default
+        $instance = $this->getInstance();
+        self::assertEquals('EUR123.4567', $this->getLine($instance, 7));
+
+        $config = new class extends AbstractConfiguration {
+            public function getAmountPrecision(): ?int
+            {
+                return 2;
+            }
+        };
+        $instance = $this->getInstance($config);
+        self::assertEquals('EUR123.46', $this->getLine($instance, 7));
+
+        $config = new class extends AbstractConfiguration {
+            public function getAmountPrecision(): ?int
+            {
+                return 1;
+            }
+        };
+        $instance = $this->getInstance($config);
+        self::assertEquals('EUR123.5', $this->getLine($instance, 7));
+
+        $config = new class extends AbstractConfiguration {
+            public function getAmountPrecision(): ?int
+            {
+                return 5;
+            }
+        };
+        $instance = $this->getInstance($config);
+        self::assertEquals('EUR123.45670', $this->getLine($instance, 7));
+
+        $config = new class extends AbstractConfiguration {
+            public function getAmountPrecision(): ?int
+            {
+                return null;
+            }
+        };
+        $instance = $this->getInstance($config);
+        self::assertEquals('EUR123.4567', $this->getLine($instance, 7));
+    }
+
+    public function testGetDueDateHandler()
+    {
+        // test default
+        $instance = $this->getInstance();
+        try {
+            $instance->getDueDate();
+            $this->fail('Expected ' . UnsupportedMethodException::class);
+        } catch (UnsupportedMethodException $e) {
+        }
+        try {
+            $instance->setDueDate(new DateTimeImmutable());
+            $this->fail('Expected ' . UnsupportedMethodException::class);
+        } catch (UnsupportedMethodException $e) {
+        }
+
+        $dueDateHandler = new class implements DueDateHandlerInterface {
+            /**
+             * @var DateTimeInterface
+             */
+            private $dueDate = null;
+
+            public function setDueDate(DateTimeInterface $dueDate): void
+            {
+                $this->dueDate = $dueDate;
+            }
+
+            public function getDueDate(): DateTimeInterface
+            {
+                return $this->dueDate ?? new DateTimeImmutable();
+            }
+        };
+        $config = new class($dueDateHandler) extends AbstractConfiguration {
+            /**
+             * @var DueDateHandlerInterface
+             */
+            private $dueDateHandler;
+
+            public function __construct(DueDateHandlerInterface $dueDateHandler)
+            {
+                $this->dueDateHandler = $dueDateHandler;
+            }
+
+            public function getDueDateHandler(): ?DueDateHandlerInterface
+            {
+                return $this->dueDateHandler;
+            }
+
+            public function getCustomData(): iterable
+            {
+                yield $this->dueDateHandler->getDueDate()->format('Ymd');
+            }
+        };
+        $instance = $this->getInstance($config);
+        $instance->setDueDate(new DateTimeImmutable('2025-01-01 12:00:00'));
+        self::assertEquals('2025-01-01 12:00:00', $instance->getDueDate()->format('Y-m-d H:i:s'));
+        self::assertEquals('20250101', $this->getLine($instance, 11));
+    }
+
+    private function getInstance(AbstractConfiguration $configuration = null): QrPayment
+    {
+        return (new QrPayment(new CzechIbanAdapter('1325090010', '3030'), $configuration))
+            ->setAmount(123.4567)
+            ->setBeneficiaryName('Random Dude');
+    }
+
+    private function getLine(QrPayment $payment, int $line): ?string
+    {
+        $lines = $this->getLines($payment);
+        if (!isset($lines[$line])) {
+            return null;
+        }
+
+        return $lines[$line];
+    }
+
+    private function getLines(QrPayment $payment): array
+    {
+        $result = $payment->getQrString();
+        return explode("\n", $result);
+    }
+}