diff --git a/src/main/java/sirius/pasta/tagliatelle/compiler/TemplateCompiler.java b/src/main/java/sirius/pasta/tagliatelle/compiler/TemplateCompiler.java
index 87e30f5bc..deeabe168 100644
--- a/src/main/java/sirius/pasta/tagliatelle/compiler/TemplateCompiler.java
+++ b/src/main/java/sirius/pasta/tagliatelle/compiler/TemplateCompiler.java
@@ -8,14 +8,14 @@
 
 package sirius.pasta.tagliatelle.compiler;
 
-import sirius.kernel.tokenizer.Char;
-import sirius.kernel.tokenizer.ParseError;
-import sirius.kernel.tokenizer.Position;
 import sirius.kernel.commons.Explain;
 import sirius.kernel.commons.Strings;
 import sirius.kernel.di.std.PriorityParts;
 import sirius.kernel.health.Exceptions;
 import sirius.kernel.health.HandledException;
+import sirius.kernel.tokenizer.Char;
+import sirius.kernel.tokenizer.ParseError;
+import sirius.kernel.tokenizer.Position;
 import sirius.pasta.Pasta;
 import sirius.pasta.noodle.Callable;
 import sirius.pasta.noodle.ConstantCall;
@@ -33,7 +33,10 @@
 
 import javax.annotation.Nullable;
 import java.util.Collection;
+import java.util.HashSet;
 import java.util.List;
+import java.util.Set;
+import java.util.function.Predicate;
 
 /**
  * Compiles a sources file into a {@link sirius.pasta.tagliatelle.Template}.
@@ -369,6 +372,8 @@ private void handleTag(TagHandler handler, CompositeEmitter block) {
      * @param handler the handler to add the attributes to
      */
     private void parseAttributes(TagHandler handler) {
+        // Collect all parsed attributes.
+        Set<String> attributes = new HashSet<>();
         while (true) {
             skipWhitespaces();
             if (reader.current().isEndOfInput() || reader.current().is('>', '/')) {
@@ -379,6 +384,10 @@ private void parseAttributes(TagHandler handler) {
             verifyAttributeNameAndType(handler, name, attributeType);
             if (attributeType == null) {
                 attributeType = String.class;
+            } else {
+                // verifyAttributeNameAndType(...) already reports an error if the attributeType is unknown.
+                // We only save the found and defined attributes.
+                attributes.add(name);
             }
 
             skipWhitespaces();
@@ -417,6 +426,24 @@ private void parseAttributes(TagHandler handler) {
             }
             consumeExpectedCharacter('"');
         }
+
+        checkMissingAttributes(handler, attributes);
+    }
+
+    /**
+     * Checks if all required attributes are present.
+     *
+     * @param handler    the tag handler
+     * @param attributes the set of attributes which were parsed
+     */
+    private void checkMissingAttributes(TagHandler handler, Set<String> attributes) {
+        handler.getRequiredAttributeNames()
+               .stream()
+               .filter(Predicate.not(attributes::contains))
+               .forEach(attr -> context.error(reader.current(),
+                                              "Missing required attribute. %s missing the required attribute '%s'.",
+                                              handler.getTagName(),
+                                              attr));
     }
 
     private void parseAttributeExpression(TagHandler handler,
diff --git a/src/main/java/sirius/pasta/tagliatelle/tags/ArgTag.java b/src/main/java/sirius/pasta/tagliatelle/tags/ArgTag.java
index b258d4972..7dcfef7ad 100644
--- a/src/main/java/sirius/pasta/tagliatelle/tags/ArgTag.java
+++ b/src/main/java/sirius/pasta/tagliatelle/tags/ArgTag.java
@@ -19,6 +19,7 @@
 import javax.annotation.Nonnull;
 import java.util.Arrays;
 import java.util.List;
+import java.util.Set;
 
 /**
  * Handles <tt>i:arg</tt> which specifies a template argument.
@@ -157,4 +158,9 @@ public Class<?> getExpectedAttributeType(String name) {
 
         return super.getExpectedAttributeType(name);
     }
+
+    @Override
+    public Set<String> getRequiredAttributeNames() {
+        return Set.of(PARAM_NAME, PARAM_TYPE);
+    }
 }
diff --git a/src/main/java/sirius/pasta/tagliatelle/tags/BlockTag.java b/src/main/java/sirius/pasta/tagliatelle/tags/BlockTag.java
index 49abe85c6..6b4463dcd 100644
--- a/src/main/java/sirius/pasta/tagliatelle/tags/BlockTag.java
+++ b/src/main/java/sirius/pasta/tagliatelle/tags/BlockTag.java
@@ -20,6 +20,7 @@
 import java.util.Collections;
 import java.util.List;
 import java.util.Objects;
+import java.util.Set;
 
 /**
  * Handles <tt>i:block</tt> which specifies a template section passed into a tag invocation.
@@ -85,4 +86,9 @@ public Class<?> getExpectedAttributeType(String name) {
 
         return super.getExpectedAttributeType(name);
     }
+
+    @Override
+    public Set<String> getRequiredAttributeNames() {
+        return Set.of(PARAM_NAME);
+    }
 }
diff --git a/src/main/java/sirius/pasta/tagliatelle/tags/DefineTag.java b/src/main/java/sirius/pasta/tagliatelle/tags/DefineTag.java
index b04325906..384a4bbb7 100644
--- a/src/main/java/sirius/pasta/tagliatelle/tags/DefineTag.java
+++ b/src/main/java/sirius/pasta/tagliatelle/tags/DefineTag.java
@@ -17,6 +17,7 @@
 import javax.annotation.Nonnull;
 import java.util.Collections;
 import java.util.List;
+import java.util.Set;
 
 /**
  * Handles <tt>i:define</tt> which defines a string as the evaluation result of its body.
@@ -81,4 +82,9 @@ public Class<?> getExpectedAttributeType(String name) {
 
         return super.getExpectedAttributeType(name);
     }
+
+    @Override
+    public Set<String> getRequiredAttributeNames() {
+        return Set.of(PARAM_NAME);
+    }
 }
diff --git a/src/main/java/sirius/pasta/tagliatelle/tags/DynamicInvokeTag.java b/src/main/java/sirius/pasta/tagliatelle/tags/DynamicInvokeTag.java
index a0bfdaa19..3f24cd5a1 100644
--- a/src/main/java/sirius/pasta/tagliatelle/tags/DynamicInvokeTag.java
+++ b/src/main/java/sirius/pasta/tagliatelle/tags/DynamicInvokeTag.java
@@ -17,6 +17,7 @@
 import javax.annotation.Nonnull;
 import java.util.Collections;
 import java.util.List;
+import java.util.Set;
 
 /**
  * Handles <tt>i:dynamicInvoke</tt> which invokes or inlines a given template.
@@ -69,4 +70,9 @@ public Class<?> getExpectedAttributeType(String name) {
         // Accept anything, we don't know yet what to expect at runtime....
         return Callable.class;
     }
+
+    @Override
+    public Set<String> getRequiredAttributeNames() {
+        return Set.of(ATTR_TEMPLATE);
+    }
 }
diff --git a/src/main/java/sirius/pasta/tagliatelle/tags/ExtensionsTag.java b/src/main/java/sirius/pasta/tagliatelle/tags/ExtensionsTag.java
index d21c634aa..1ebda309b 100644
--- a/src/main/java/sirius/pasta/tagliatelle/tags/ExtensionsTag.java
+++ b/src/main/java/sirius/pasta/tagliatelle/tags/ExtensionsTag.java
@@ -20,6 +20,7 @@
 import javax.annotation.Nonnull;
 import java.util.Collections;
 import java.util.List;
+import java.util.Set;
 
 /**
  * Handles <tt>i:extensions</tt> which invokes all extensions with the given name.
@@ -86,4 +87,9 @@ public Class<?> getExpectedAttributeType(String name) {
 
         return Callable.class;
     }
+
+    @Override
+    public Set<String> getRequiredAttributeNames() {
+        return Set.of(ATTR_TARGET);
+    }
 }
diff --git a/src/main/java/sirius/pasta/tagliatelle/tags/ExtraBlockTag.java b/src/main/java/sirius/pasta/tagliatelle/tags/ExtraBlockTag.java
index b5e5ca65c..283caec2e 100644
--- a/src/main/java/sirius/pasta/tagliatelle/tags/ExtraBlockTag.java
+++ b/src/main/java/sirius/pasta/tagliatelle/tags/ExtraBlockTag.java
@@ -18,6 +18,7 @@
 import javax.annotation.Nonnull;
 import java.util.Collections;
 import java.util.List;
+import java.util.Set;
 
 /**
  * Permits to add an extra block to the global render context.
@@ -86,4 +87,9 @@ public Class<?> getExpectedAttributeType(String name) {
 
         return super.getExpectedAttributeType(name);
     }
+
+    @Override
+    public Set<String> getRequiredAttributeNames() {
+        return Set.of(PARAM_NAME);
+    }
 }
diff --git a/src/main/java/sirius/pasta/tagliatelle/tags/ForTag.java b/src/main/java/sirius/pasta/tagliatelle/tags/ForTag.java
index 04aab6555..d5faab676 100644
--- a/src/main/java/sirius/pasta/tagliatelle/tags/ForTag.java
+++ b/src/main/java/sirius/pasta/tagliatelle/tags/ForTag.java
@@ -19,6 +19,7 @@
 import javax.annotation.Nonnull;
 import java.util.Arrays;
 import java.util.List;
+import java.util.Set;
 
 /**
  * Handles <tt>i:for</tt> which emits its body for each item in an {@link Iterable}.
@@ -116,4 +117,9 @@ public Class<?> getExpectedAttributeType(String name) {
 
         return super.getExpectedAttributeType(name);
     }
+
+    @Override
+    public Set<String> getRequiredAttributeNames() {
+        return Set.of(PARAM_ITEMS, PARAM_TYPE, PARAM_VAR);
+    }
 }
diff --git a/src/main/java/sirius/pasta/tagliatelle/tags/IfTag.java b/src/main/java/sirius/pasta/tagliatelle/tags/IfTag.java
index b9b5aae3e..ec95afab0 100644
--- a/src/main/java/sirius/pasta/tagliatelle/tags/IfTag.java
+++ b/src/main/java/sirius/pasta/tagliatelle/tags/IfTag.java
@@ -16,6 +16,7 @@
 import javax.annotation.Nonnull;
 import java.util.Collections;
 import java.util.List;
+import java.util.Set;
 
 /**
  * Handles <tt>i:if</tt> which emits its body if a condition is met.
@@ -71,4 +72,9 @@ public Class<?> getExpectedAttributeType(String name) {
 
         return super.getExpectedAttributeType(name);
     }
+
+    @Override
+    public Set<String> getRequiredAttributeNames() {
+        return Set.of("test");
+    }
 }
diff --git a/src/main/java/sirius/pasta/tagliatelle/tags/IncludeTag.java b/src/main/java/sirius/pasta/tagliatelle/tags/IncludeTag.java
index 08118c1ff..923e0746d 100644
--- a/src/main/java/sirius/pasta/tagliatelle/tags/IncludeTag.java
+++ b/src/main/java/sirius/pasta/tagliatelle/tags/IncludeTag.java
@@ -18,6 +18,7 @@
 import javax.annotation.Nonnull;
 import java.util.Collections;
 import java.util.List;
+import java.util.Set;
 
 /**
  * Handles <tt>i:include</tt> which includes the contents of the given resource without any processing.
@@ -74,4 +75,9 @@ public Class<?> getExpectedAttributeType(String name) {
 
         return super.getExpectedAttributeType(name);
     }
+
+    @Override
+    public Set<String> getRequiredAttributeNames() {
+        return Set.of(ATTR_NAME);
+    }
 }
diff --git a/src/main/java/sirius/pasta/tagliatelle/tags/InvokeTag.java b/src/main/java/sirius/pasta/tagliatelle/tags/InvokeTag.java
index 29849dd0c..3543c36a7 100644
--- a/src/main/java/sirius/pasta/tagliatelle/tags/InvokeTag.java
+++ b/src/main/java/sirius/pasta/tagliatelle/tags/InvokeTag.java
@@ -18,7 +18,9 @@
 
 import javax.annotation.Nonnull;
 import java.util.Collections;
+import java.util.HashSet;
 import java.util.List;
+import java.util.Set;
 
 /**
  * Handles <tt>i:invoke</tt> which invokes or inlines a given template.
@@ -116,6 +118,21 @@ public Class<?> getExpectedAttributeType(String name) {
         }
     }
 
+    @Override
+    public Set<String> getRequiredAttributeNames() {
+        Set<String> result = new HashSet<>();
+        result.add(ATTR_TEMPLATE);
+
+        if (ensureThatTemplateIsPresent()) {
+            for (TemplateArgument arg : template.getArguments()) {
+                if (arg.getDefaultValue() == null) {
+                    result.add(arg.getName());
+                }
+            }
+        }
+        return result;
+    }
+
     private boolean ensureThatTemplateIsPresent() {
         if (template == null) {
             if (templateResolved) {
diff --git a/src/main/java/sirius/pasta/tagliatelle/tags/LocalTag.java b/src/main/java/sirius/pasta/tagliatelle/tags/LocalTag.java
index 0d29f6cd1..e46b8b797 100644
--- a/src/main/java/sirius/pasta/tagliatelle/tags/LocalTag.java
+++ b/src/main/java/sirius/pasta/tagliatelle/tags/LocalTag.java
@@ -18,6 +18,7 @@
 import javax.annotation.Nonnull;
 import java.util.Arrays;
 import java.util.List;
+import java.util.Set;
 
 /**
  * Handles <tt>i:local</tt> which defines a local variable.
@@ -92,4 +93,9 @@ public Class<?> getExpectedAttributeType(String name) {
 
         return super.getExpectedAttributeType(name);
     }
+
+    @Override
+    public Set<String> getRequiredAttributeNames() {
+        return Set.of(PARAM_NAME, PARAM_VALUE);
+    }
 }
diff --git a/src/main/java/sirius/pasta/tagliatelle/tags/PragmaTag.java b/src/main/java/sirius/pasta/tagliatelle/tags/PragmaTag.java
index 3bd309949..b9adaf34b 100644
--- a/src/main/java/sirius/pasta/tagliatelle/tags/PragmaTag.java
+++ b/src/main/java/sirius/pasta/tagliatelle/tags/PragmaTag.java
@@ -16,6 +16,7 @@
 import javax.annotation.Nonnull;
 import java.util.Arrays;
 import java.util.List;
+import java.util.Set;
 
 /**
  * Handles <tt>i:pragma</tt> which defines a pragma (key / value pair) for a template.
@@ -79,4 +80,9 @@ public Class<?> getExpectedAttributeType(String name) {
 
         return super.getExpectedAttributeType(name);
     }
+
+    @Override
+    public Set<String> getRequiredAttributeNames() {
+        return Set.of(PARAM_NAME);
+    }
 }
diff --git a/src/main/java/sirius/pasta/tagliatelle/tags/RenderTag.java b/src/main/java/sirius/pasta/tagliatelle/tags/RenderTag.java
index 9ae3d5d70..a78ae2f83 100644
--- a/src/main/java/sirius/pasta/tagliatelle/tags/RenderTag.java
+++ b/src/main/java/sirius/pasta/tagliatelle/tags/RenderTag.java
@@ -17,6 +17,7 @@
 import javax.annotation.Nonnull;
 import java.util.Collections;
 import java.util.List;
+import java.util.Set;
 
 /**
  * Handles <tt>i:render</tt> which emits the block with the given name.
@@ -79,4 +80,9 @@ public Class<?> getExpectedAttributeType(String name) {
 
         return super.getExpectedAttributeType(name);
     }
+
+    @Override
+    public Set<String> getRequiredAttributeNames() {
+        return Set.of(PARAM_NAME);
+    }
 }
diff --git a/src/main/java/sirius/pasta/tagliatelle/tags/SassTag.java b/src/main/java/sirius/pasta/tagliatelle/tags/SassTag.java
index c2ee2ec7b..37ecdac69 100644
--- a/src/main/java/sirius/pasta/tagliatelle/tags/SassTag.java
+++ b/src/main/java/sirius/pasta/tagliatelle/tags/SassTag.java
@@ -24,6 +24,7 @@
 import java.io.StringReader;
 import java.util.Collections;
 import java.util.List;
+import java.util.Set;
 
 /**
  * Handles <tt>i:sass</tt> which renders a SASS file into the current template as compiled CSS.
@@ -93,4 +94,9 @@ public Class<?> getExpectedAttributeType(String name) {
 
         return super.getExpectedAttributeType(name);
     }
+
+    @Override
+    public Set<String> getRequiredAttributeNames() {
+        return Set.of(SOURCE_ATTRIBUTE);
+    }
 }
diff --git a/src/main/java/sirius/pasta/tagliatelle/tags/SwitchTag.java b/src/main/java/sirius/pasta/tagliatelle/tags/SwitchTag.java
index c566922c9..7ee1e7d97 100644
--- a/src/main/java/sirius/pasta/tagliatelle/tags/SwitchTag.java
+++ b/src/main/java/sirius/pasta/tagliatelle/tags/SwitchTag.java
@@ -16,6 +16,7 @@
 import javax.annotation.Nonnull;
 import java.util.Collections;
 import java.util.List;
+import java.util.Set;
 
 /**
  * Handles <tt>i:switch</tt> which can hold multiple blocks which are only rendered if their name matches an expression.
@@ -68,4 +69,9 @@ public Class<?> getExpectedAttributeType(String name) {
 
         return super.getExpectedAttributeType(name);
     }
+
+    @Override
+    public Set<String> getRequiredAttributeNames() {
+        return Set.of("test");
+    }
 }
diff --git a/src/main/java/sirius/pasta/tagliatelle/tags/TagHandler.java b/src/main/java/sirius/pasta/tagliatelle/tags/TagHandler.java
index f85d6a355..6fe2b7313 100644
--- a/src/main/java/sirius/pasta/tagliatelle/tags/TagHandler.java
+++ b/src/main/java/sirius/pasta/tagliatelle/tags/TagHandler.java
@@ -24,9 +24,11 @@
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Optional;
+import java.util.Set;
 
 /**
  * Handles a tag detected by the {@link sirius.pasta.tagliatelle.compiler.TemplateCompiler}.
@@ -93,6 +95,14 @@ public Callable getAttribute(String name) {
         return attributes.get(name);
     }
 
+    /**
+     * Returns all required attribute names.
+     * @return a set of all attribute names.
+     */
+    public Set<String> getRequiredAttributeNames() {
+        return Collections.emptySet();
+    }
+
     /**
      * Fetches the attribute with the given name, expecting that a constant value is present.
      *
diff --git a/src/main/java/sirius/pasta/tagliatelle/tags/TaglibTagHandler.java b/src/main/java/sirius/pasta/tagliatelle/tags/TaglibTagHandler.java
index 4c69a3c3a..e870d6537 100644
--- a/src/main/java/sirius/pasta/tagliatelle/tags/TaglibTagHandler.java
+++ b/src/main/java/sirius/pasta/tagliatelle/tags/TaglibTagHandler.java
@@ -13,6 +13,9 @@
 import sirius.pasta.tagliatelle.TemplateArgument;
 import sirius.pasta.tagliatelle.emitter.CompositeEmitter;
 
+import java.util.HashSet;
+import java.util.Set;
+
 /**
  * Handles the invocation of a user-defined tag.
  * <p>
@@ -50,4 +53,15 @@ public Class<?> getExpectedAttributeType(String name) {
 
         return super.getExpectedAttributeType(name);
     }
+
+    @Override
+    public Set<String> getRequiredAttributeNames() {
+        Set<String> result = new HashSet<>();
+        for (TemplateArgument arg : template.getArguments()) {
+            if (arg.getDefaultValue() == null) {
+                result.add(arg.getName());
+            }
+        }
+        return result;
+    }
 }