diff --git a/src/main/java/seedu/address/ExpenseMainApp.java b/src/main/java/seedu/address/ExpenseMainApp.java
index eeb6f8e3623..51d8e0100ad 100644
--- a/src/main/java/seedu/address/ExpenseMainApp.java
+++ b/src/main/java/seedu/address/ExpenseMainApp.java
@@ -69,7 +69,8 @@ public void init() throws Exception {
     }
 
     /**
-     * Returns a {@code ExpenseModelManager} with the data from {@code storage}'s expense book and {@code userPrefs}. <br>
+     * Returns a {@code ExpenseModelManager} with the data from {@code storage}'s expense book
+     * and {@code userPrefs}. <br>
      * The data from the sample expense book will be used instead if {@code storage}'s expense book is not found,
      * or an empty expense book will be used instead if errors occur when reading {@code storage}'s expense book.
      */
diff --git a/src/main/java/seedu/address/logic/commands/DeleteDescriptionCommand.java b/src/main/java/seedu/address/logic/commands/DeleteDescriptionCommand.java
index e7bd6386fa6..e7aa4ee04dc 100644
--- a/src/main/java/seedu/address/logic/commands/DeleteDescriptionCommand.java
+++ b/src/main/java/seedu/address/logic/commands/DeleteDescriptionCommand.java
@@ -8,8 +8,9 @@
 import seedu.address.commons.core.index.Index;
 import seedu.address.logic.commands.exceptions.CommandException;
 import seedu.address.model.Model;
-import seedu.address.model.person.Expense;
 import seedu.address.model.person.Description;
+import seedu.address.model.person.Expense;
+
 
 
 /**
@@ -30,8 +31,8 @@ public class DeleteDescriptionCommand extends Command {
     public static final String MESSAGE_ARGUMENTS = "Index: %1$d, Description: %2$s";
     public static final String MESSAGE_ADD_DESCRIPTION_SUCCESS = "Added description to Expense: %1$s \n";
     public static final String MESSAGE_DELETE_DESCRIPTION_SUCCESS = "Removed description from Expense: %1$s \n";
-    private final Index index;
     private static final Description EMPTY_DESCRIPTION = new Description("");
+    private final Index index;
 
     /**
      * @param index of the expense in the filtered expense list to edit the description
@@ -51,7 +52,8 @@ public CommandResult execute(Model model) throws CommandException {
         }
 
         Expense expenseToEdit = lastShownList.get(index.getZeroBased());
-        Expense editedExpense = new Expense(expenseToEdit.getAmount(), expenseToEdit.getDate(), expenseToEdit.getCategory(),
+        Expense editedExpense = new Expense(expenseToEdit.getAmount(), expenseToEdit.getDate(),
+                expenseToEdit.getCategory(),
                 EMPTY_DESCRIPTION);
 
         model.setExpense(expenseToEdit, editedExpense);
@@ -85,4 +87,4 @@ private String generateSuccessMessage(Expense expenseToEdit) {
         String message = MESSAGE_DELETE_DESCRIPTION_SUCCESS;
         return String.format(message, expenseToEdit);
     }
-}
\ No newline at end of file
+}
diff --git a/src/main/java/seedu/address/logic/commands/ViewCategoryCommand.java b/src/main/java/seedu/address/logic/commands/ViewCategoryCommand.java
index a743f63481d..45de39452b9 100644
--- a/src/main/java/seedu/address/logic/commands/ViewCategoryCommand.java
+++ b/src/main/java/seedu/address/logic/commands/ViewCategoryCommand.java
@@ -1,4 +1,35 @@
 package seedu.address.logic.commands;
 
-public class ViewCategoryCommand {
+import seedu.address.logic.commands.exceptions.CommandException;
+import seedu.address.model.Model;
+import seedu.address.model.person.Category;
+import seedu.address.model.person.Expense;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class ViewCategoryCommand extends Command {
+
+    public static final String COMMAND_WORD = "viewCategory";
+
+    public static final String MESSAGE_USAGE = COMMAND_WORD
+            + ": Finds all the category labels used in the ExpenseBook so far. \n"
+            + "Example: " + COMMAND_WORD ;
+
+    public static final String MESSAGE_VIEW_CATEGORY_LABELS_SUCCESS =
+            "View all the existing category labels: \n";
+
+    public ViewCategoryCommand() {
+    }
+
+    @Override
+    public CommandResult execute(Model model) throws CommandException {
+        String message = "";
+        List<Category> categories = model.getCategoryLabels();
+        for (int i = 0; i < categories.size(); i++){
+            message = message + categories.get(i).categoryName + "\n";
+        }
+        return new CommandResult(MESSAGE_VIEW_CATEGORY_LABELS_SUCCESS + message);
+    }
+
 }
diff --git a/src/main/java/seedu/address/logic/commands/ViewCommand.java b/src/main/java/seedu/address/logic/commands/ViewCommand.java
index ddad1ab562b..ffd3faabafc 100644
--- a/src/main/java/seedu/address/logic/commands/ViewCommand.java
+++ b/src/main/java/seedu/address/logic/commands/ViewCommand.java
@@ -37,7 +37,7 @@ public CommandResult execute(Model model) throws CommandException {
         }
 
         Expense expenseToView = lastShownList.get(targetIndex.getZeroBased());
-        String prefix = String.format(MESSAGE_VIEW_EXPENSE_SUCCESS, targetIndex.getZeroBased());
+        String prefix = String.format(MESSAGE_VIEW_EXPENSE_SUCCESS, targetIndex.getOneBased());
         String message = prefix + "\n" + expenseToView.toString();
         return new CommandResult(message);
     }
diff --git a/src/main/java/seedu/address/logic/parser/ExpenseBookParser.java b/src/main/java/seedu/address/logic/parser/ExpenseBookParser.java
index 7e1ae3c3bc4..b681df2c6c3 100644
--- a/src/main/java/seedu/address/logic/parser/ExpenseBookParser.java
+++ b/src/main/java/seedu/address/logic/parser/ExpenseBookParser.java
@@ -1,23 +1,13 @@
 package seedu.address.logic.parser;
 
-import static seedu.address.commons.core.Messages.MESSAGE_INVALID_COMMAND_FORMAT;
-import static seedu.address.commons.core.Messages.MESSAGE_UNKNOWN_COMMAND;
+import seedu.address.logic.commands.*;
+import seedu.address.logic.parser.exceptions.ParseException;
 
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
-import seedu.address.logic.commands.AddExpenseCommand;
-import seedu.address.logic.commands.Command;
-import seedu.address.logic.commands.DeleteExpenseCommand;
-import seedu.address.logic.commands.DeleteDescriptionCommand;
-import seedu.address.logic.commands.DescriptionCommand;
-import seedu.address.logic.commands.ListExpenseCommand;
-import seedu.address.logic.commands.HelpCommand;
-import seedu.address.logic.commands.ViewCommand;
-import seedu.address.logic.commands.SetBudgetCommand;
-import seedu.address.logic.commands.ShowBudgetCommand;
-
-import seedu.address.logic.parser.exceptions.ParseException;
+import static seedu.address.commons.core.Messages.MESSAGE_INVALID_COMMAND_FORMAT;
+import static seedu.address.commons.core.Messages.MESSAGE_UNKNOWN_COMMAND;
 
 /**
  * Parses user input.
@@ -44,31 +34,35 @@ public Command parseCommand(String userInput) throws ParseException {
         final String commandWord = matcher.group("commandWord");
         final String arguments = matcher.group("arguments");
         switch (commandWord) {
-        case DescriptionCommand.COMMAND_WORD:
-            return new DescriptionCommandParser().parse(arguments);
+            case DescriptionCommand.COMMAND_WORD:
+                return new DescriptionCommandParser().parse(arguments);
+
+            case AddExpenseCommand.COMMAND_WORD:
+                return new AddExpenseCommandParser().parse(arguments);
+
+            case DeleteExpenseCommand.COMMAND_WORD:
+                return new DeleteExpenseCommandParser().parse(arguments);
+
+            case ListExpenseCommand.COMMAND_WORD:
+                return new ListExpenseCommand();
+
+            case ViewCommand.COMMAND_WORD:
+                return new ViewCommandParser().parse(arguments);
+
+            case ViewCategoryCommand.COMMAND_WORD:
+                return new ViewCategoryCommandParser().parse(arguments);
 
-        case AddExpenseCommand.COMMAND_WORD:
-            return new AddExpenseCommandParser().parse(arguments);
+            case DeleteDescriptionCommand.COMMAND_WORD:
+                return new DeleteDescriptionCommandParser().parse(arguments);
 
-        case DeleteExpenseCommand.COMMAND_WORD:
-            return new DeleteExpenseCommandParser().parse(arguments);
-        case ListExpenseCommand.COMMAND_WORD:
-            return new ListExpenseCommand();
+            case ShowBudgetCommand.COMMAND_WORD:
+                return new ShowBudgetCommandParser().parse(arguments);
 
-        case ViewCommand.COMMAND_WORD:
-            return new ViewCommandParser().parse(arguments);
-            
-        case DeleteDescriptionCommand.COMMAND_WORD:
-            return new DeleteDescriptionCommandParser().parse(arguments);
-            
-        case ShowBudgetCommand.COMMAND_WORD:
-            return new ShowBudgetCommandParser().parse(arguments);
-            
-        case SetBudgetCommand.COMMAND_WORD:
-            return new SetBudgetCommandParser().parse(arguments);
+            case SetBudgetCommand.COMMAND_WORD:
+                return new SetBudgetCommandParser().parse(arguments);
 
-        default:
-            throw new ParseException(MESSAGE_UNKNOWN_COMMAND);
+            default:
+                throw new ParseException(MESSAGE_UNKNOWN_COMMAND);
         }
     }
 }
diff --git a/src/main/java/seedu/address/logic/parser/ViewCategoryCommandParser.java b/src/main/java/seedu/address/logic/parser/ViewCategoryCommandParser.java
index f4284a41ec3..b48e069d65a 100644
--- a/src/main/java/seedu/address/logic/parser/ViewCategoryCommandParser.java
+++ b/src/main/java/seedu/address/logic/parser/ViewCategoryCommandParser.java
@@ -1,4 +1,20 @@
 package seedu.address.logic.parser;
 
-public class ViewCategoryCommandParser {
+import seedu.address.commons.core.index.Index;
+import seedu.address.commons.exceptions.IllegalValueException;
+import seedu.address.logic.commands.DescriptionCommand;
+import seedu.address.logic.commands.ShowBudgetCommand;
+import seedu.address.logic.commands.ViewCategoryCommand;
+import seedu.address.logic.parser.exceptions.ParseException;
+import seedu.address.model.person.Description;
+
+import static java.util.Objects.requireNonNull;
+import static seedu.address.commons.core.Messages.MESSAGE_INVALID_COMMAND_FORMAT;
+import static seedu.address.logic.parser.CliSyntax.PREFIX_CATEGORY;
+
+public class ViewCategoryCommandParser implements Parser<ViewCategoryCommand>{
+    @Override
+    public ViewCategoryCommand parse(String args) throws ParseException {
+        return new ViewCategoryCommand();
+    }
 }
diff --git a/src/main/java/seedu/address/model/ExpenseBook.java b/src/main/java/seedu/address/model/ExpenseBook.java
index 541b70e14b0..94098178a0f 100644
--- a/src/main/java/seedu/address/model/ExpenseBook.java
+++ b/src/main/java/seedu/address/model/ExpenseBook.java
@@ -6,6 +6,7 @@
 
 import javafx.collections.ObservableList;
 import seedu.address.commons.core.index.Index;
+import seedu.address.model.person.Category;
 import seedu.address.model.person.Expense;
 import seedu.address.model.person.UniqueExpenseList;
 
@@ -145,4 +146,8 @@ public double getRemainingBudget() {
     }
     //end of yuanxing edits
 
+    public List<Category> getCategoryLabels(){
+        return expenses.getCategoryLabels();
+    }
+
 }
diff --git a/src/main/java/seedu/address/model/ExpenseModelManager.java b/src/main/java/seedu/address/model/ExpenseModelManager.java
index d1448964b8f..8216d0aa538 100644
--- a/src/main/java/seedu/address/model/ExpenseModelManager.java
+++ b/src/main/java/seedu/address/model/ExpenseModelManager.java
@@ -4,6 +4,7 @@
 import static seedu.address.commons.util.CollectionUtil.requireAllNonNull;
 
 import java.nio.file.Path;
+import java.util.List;
 import java.util.function.Predicate;
 import java.util.logging.Logger;
 
@@ -12,6 +13,7 @@
 import seedu.address.commons.core.GuiSettings;
 import seedu.address.commons.core.LogsCenter;
 import seedu.address.commons.core.index.Index;
+import seedu.address.model.person.Category;
 import seedu.address.model.person.Expense;
 import seedu.address.model.person.Person;
 
@@ -26,6 +28,7 @@ public class ExpenseModelManager implements Model {
     private final FilteredList<Expense> filteredExpenses;
 
 
+
     /**
      * Initializes a ModelManager with the given addressBook and userPrefs.
      */
@@ -120,7 +123,6 @@ public void setExpense(Expense target, Expense editedExpense) {
         expenseBook.setExpense(target, editedExpense);
     }
 
-
     //=========== Filtered Expense List Accessors =============================================================
 
     /**
@@ -183,5 +185,10 @@ public void setExpenseBookBudget(double budget) {
         expenseBook.setBudget(budget);
     }
 
+    @Override
+    public List<Category> getCategoryLabels() {
+        return expenseBook.getCategoryLabels();
+    }
+
 
 }
diff --git a/src/main/java/seedu/address/model/Model.java b/src/main/java/seedu/address/model/Model.java
index 93c1686d244..07b433c0a80 100644
--- a/src/main/java/seedu/address/model/Model.java
+++ b/src/main/java/seedu/address/model/Model.java
@@ -1,11 +1,13 @@
 package seedu.address.model;
 
 import java.nio.file.Path;
+import java.util.List;
 import java.util.function.Predicate;
 
 import javafx.collections.ObservableList;
 import seedu.address.commons.core.GuiSettings;
 import seedu.address.commons.core.index.Index;
+import seedu.address.model.person.Category;
 import seedu.address.model.person.Expense;
 import seedu.address.model.person.Person;
 
@@ -102,4 +104,6 @@ public interface Model {
     double getExpenseBookRemaining();
 
     void setExpenseBookBudget(double budget);
+
+    List<Category> getCategoryLabels();
 }
diff --git a/src/main/java/seedu/address/model/ModelManager.java b/src/main/java/seedu/address/model/ModelManager.java
index 91765c188c9..7fd51da3aec 100644
--- a/src/main/java/seedu/address/model/ModelManager.java
+++ b/src/main/java/seedu/address/model/ModelManager.java
@@ -4,6 +4,7 @@
 import static seedu.address.commons.util.CollectionUtil.requireAllNonNull;
 
 import java.nio.file.Path;
+import java.util.List;
 import java.util.function.Predicate;
 import java.util.logging.Logger;
 
@@ -12,6 +13,7 @@
 import seedu.address.commons.core.GuiSettings;
 import seedu.address.commons.core.LogsCenter;
 import seedu.address.commons.core.index.Index;
+import seedu.address.model.person.Category;
 import seedu.address.model.person.Expense;
 import seedu.address.model.person.Person;
 
@@ -28,7 +30,6 @@ public class ModelManager implements Model {
     private final FilteredList<Expense> filteredExpenses;
 //    private final ExpenseBook expenseBook;
 
-    private Expense expenseToBeViewed;
 
     /**
      * Initializes a ModelManager with the given addressBook and userPrefs.
@@ -201,6 +202,11 @@ public void setExpenseBookBudget(double budget) {
 
     }
 
+    @Override
+    public List<Category> getCategoryLabels() {
+        return null;
+    }
+
     @Override
     public boolean equals(Object obj) {
         // short circuit if same object
diff --git a/src/main/java/seedu/address/model/person/Expense.java b/src/main/java/seedu/address/model/person/Expense.java
index bcf1461d1e6..faa72a2189f 100644
--- a/src/main/java/seedu/address/model/person/Expense.java
+++ b/src/main/java/seedu/address/model/person/Expense.java
@@ -103,6 +103,7 @@ public String toString() {
                     .append("\n")
                     .append(" Date: ")
                     .append(this.getDate())
+                    .append("\n")
                     .append(" Category: ")
                     .append(this.getCategory())
                     .append("\n")
diff --git a/src/main/java/seedu/address/model/person/UniqueExpenseList.java b/src/main/java/seedu/address/model/person/UniqueExpenseList.java
index 23a7ae4ff52..58fd87a002b 100644
--- a/src/main/java/seedu/address/model/person/UniqueExpenseList.java
+++ b/src/main/java/seedu/address/model/person/UniqueExpenseList.java
@@ -4,6 +4,7 @@
 import static java.util.Objects.requireNonNull;
 import static seedu.address.commons.util.CollectionUtil.requireAllNonNull;
 
+import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
 
@@ -164,4 +165,16 @@ public double getRemainingBudget() {
         }
         return this.budget - used;
     }
+
+    public List<Category> getCategoryLabels(){
+        List<Category> categories = new ArrayList<>();
+        for(int i = 0; i < internalList.size(); i++) {
+            Expense current = internalList.get(i);
+            Category currentCategory = current.getCategory();
+            if(!categories.contains(currentCategory)){
+                categories.add(currentCategory);
+            }
+        }
+        return categories;
+    }
 }