diff --git a/library/src/main/java/org/mustangproject/Charge.java b/library/src/main/java/org/mustangproject/Charge.java
index aaa14ba2..ab42ba51 100644
--- a/library/src/main/java/org/mustangproject/Charge.java
+++ b/library/src/main/java/org/mustangproject/Charge.java
@@ -124,7 +124,9 @@ public class Charge implements IZUGFeRDAllowanceCharge {
 		if(totalAmount != null) {
 			return totalAmount;
 		} else if (percent!=null) {
-			return currentItem.getValue().multiply(getPercent().divide(new BigDecimal(100)));
+			BigDecimal singlePrice=currentItem.getValue().divide(BigDecimal.ONE.add(getPercent().divide(new BigDecimal(100))));
+			BigDecimal singlePriceDiff=currentItem.getValue().subtract(singlePrice);
+			return singlePriceDiff;
 		} else {
 			throw new RuntimeException("percent must be set");
 		}
diff --git a/library/src/main/java/org/mustangproject/ZUGFeRD/LineCalculator.java b/library/src/main/java/org/mustangproject/ZUGFeRD/LineCalculator.java
index d7e010cb..632c1d66 100644
--- a/library/src/main/java/org/mustangproject/ZUGFeRD/LineCalculator.java
+++ b/library/src/main/java/org/mustangproject/ZUGFeRD/LineCalculator.java
@@ -20,12 +20,14 @@ public class LineCalculator {
 
 		if (currentItem.getItemAllowances() != null && currentItem.getItemAllowances().length > 0) {
 			for (IZUGFeRDAllowanceCharge allowance : currentItem.getItemAllowances()) {
-				addAllowance(allowance.getTotalAmount(currentItem));
+				BigDecimal singleAllowance=allowance.getTotalAmount(currentItem);
+				addAllowance(singleAllowance.multiply(currentItem.getQuantity()));
 			}
 		}
 		if (currentItem.getItemCharges() != null && currentItem.getItemCharges().length > 0) {
 			for (IZUGFeRDAllowanceCharge charge : currentItem.getItemCharges()) {
-				addCharge(charge.getTotalAmount(currentItem));
+				BigDecimal singleCharge=charge.getTotalAmount(currentItem);
+				addCharge(singleCharge.multiply(currentItem.getQuantity()));
 			}
 		}
 		if (currentItem.getItemTotalAllowances() != null && currentItem.getItemTotalAllowances().length > 0) {
diff --git a/library/src/test/java/org/mustangproject/ZUGFeRD/CalculationTest.java b/library/src/test/java/org/mustangproject/ZUGFeRD/CalculationTest.java
index 73499123..55881ba7 100644
--- a/library/src/test/java/org/mustangproject/ZUGFeRD/CalculationTest.java
+++ b/library/src/test/java/org/mustangproject/ZUGFeRD/CalculationTest.java
@@ -223,6 +223,46 @@ public class CalculationTest extends ResourceCase {
 		assertEquals(valueOf(101.86).stripTrailingZeros(), calculator.getGrandTotal().stripTrailingZeros());
 	}
 
+	public void testSimpleItemPercentAllowance() {
+		SimpleDateFormat sqlDate = new SimpleDateFormat("yyyy-MM-dd");
+
+		Invoice invoice = new Invoice();
+		invoice.setDocumentName("Rechnung");
+		invoice.setNumber("777777");
+		try {
+			invoice.setIssueDate(sqlDate.parse("2020-12-31"));
+			invoice.setDetailedDeliveryPeriod(sqlDate.parse("2020-12-01 - 2020-12-31".split(" - ")[0]), sqlDate.parse("2020-12-01 - 2020-12-31".split(" - ")[1]));
+			invoice.setDeliveryDate(sqlDate.parse("2020-12-31"));
+			invoice.setDueDate(sqlDate.parse("2021-01-15"));
+		} catch (Exception e) {
+			LOGGER.error("Failed to set dates", e);
+
+		}
+		TradeParty sender = new TradeParty("Maier GmbH", "Musterweg 5", "11111", "Testung", "DE");
+		sender.addVATID("DE2222222222");
+		invoice.setSender(sender);
+
+		/* trade party (recipient) */
+		TradeParty recipient = new TradeParty("Teston GmbH" + " " + "Zentrale" + " " + "", "Testweg 5", "11111", "Testung", "DE");
+		recipient.setID("111111");
+		recipient.addVATID("DE111111111");
+		invoice.setRecipient(recipient);
+
+		/* item */
+		Product product;
+		Item item;
+
+		product = new Product("AAA", "", "H84", BigDecimal.ZERO);
+		item = new Item(product, new BigDecimal("1.10"), new BigDecimal(5.00));
+
+		item.addAllowance(new Allowance().setPercent(new BigDecimal(10)).setTaxPercent(BigDecimal.ZERO));
+		invoice.addItem(item);
+
+		TransactionCalculator calculator = new TransactionCalculator(invoice);
+		assertEquals(new BigDecimal(5), calculator.getGrandTotal().stripTrailingZeros());
+	}
+
+
 	/**
 	 * LineCalculator should not throw an exception when calculating a non-terminating decimal expansion
 	 * */