diff --git a/app/Models/Bucket.php b/app/Models/Bucket.php
index 152f0ed..4b7ae38 100644
--- a/app/Models/Bucket.php
+++ b/app/Models/Bucket.php
@@ -27,12 +27,15 @@ class Bucket extends Model
         'sort_order',
         'allocation_type',
         'allocation_value',
+        'starting_amount',
     ];
 
     protected $casts = [
         'priority' => 'integer',
         'sort_order' => 'integer',
         'allocation_value' => 'decimal:2',
+        'starting_amount' => 'integer',
+        'allocation_type' => BucketAllocationType::class,
     ];
 
     public function scenario(): BelongsTo
@@ -42,21 +45,17 @@ public function scenario(): BelongsTo
 
     /**
      * Get the draws for the bucket.
-     * (Will be implemented when Draw model is created)
      */
     public function draws(): HasMany
     {
-        // TODO: Implement when Draw model is created
         return $this->hasMany(Draw::class);
     }
 
     /**
      * Get the outflows for the bucket.
-     * (Will be implemented when Outflow model is created)
      */
     public function outflows(): HasMany
     {
-        // TODO: Implement when Outflow model is created
         return $this->hasMany(Outflow::class);
     }
 
@@ -78,12 +77,14 @@ public function scopeOrderedBySortOrder($query)
 
     /**
      * Get the current balance of the bucket.
-     * For MVP, this will always return 0 as we don't have transactions yet.
+     * Calculates starting amount plus total draws (money allocated to bucket) minus total outflows (money spent from bucket).
      */
     public function getCurrentBalance(): float
     {
-        // TODO: Calculate from draws minus outflows when those features are implemented
-        return 0.0;
+        $totalDrawsCents = $this->draws()->sum('amount');
+        $totalOutflowsCents = $this->outflows()->sum('amount');
+
+        return ($this->starting_amount + $totalDrawsCents - $totalOutflowsCents) / 100;
     }
 
     /**
diff --git a/app/Models/Stream.php b/app/Models/Stream.php
index 66860c9..0e68039 100644
--- a/app/Models/Stream.php
+++ b/app/Models/Stream.php
@@ -2,11 +2,13 @@
 
 namespace App\Models;
 
+use App\Models\Traits\HasAmount;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 
 class Stream extends Model
 {
+    use HasAmount;
     const TYPE_INCOME = 'income';
     const TYPE_EXPENSE = 'expense';
 
@@ -31,7 +33,7 @@ class Stream extends Model
     ];
 
     protected $casts = [
-        'amount' => 'decimal:2',
+        'amount' => 'integer',
         'start_date' => 'date',
         'end_date' => 'date',
         'is_active' => 'boolean',
@@ -42,6 +44,7 @@ public function scenario(): BelongsTo
         return $this->belongsTo(Scenario::class);
     }
 
+
     public function bucket(): BelongsTo
     {
         return $this->belongsTo(Bucket::class);
diff --git a/app/Models/Traits/HasAmount.php b/app/Models/Traits/HasAmount.php
new file mode 100644
index 0000000..0ad6fa4
--- /dev/null
+++ b/app/Models/Traits/HasAmount.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace App\Models\Traits;
+
+trait HasAmount
+{
+    /**
+     * Get amount in currency units (stored as minor units/cents).
+     */
+    public function getAmountCurrencyAttribute(): float
+    {
+        return $this->amount / 100;
+    }
+
+    /**
+     * Set amount from currency units (stores as minor units/cents).
+     */
+    public function setAmountCurrencyAttribute($value): void
+    {
+        $this->attributes['amount'] = round($value * 100);
+    }
+
+    /**
+     * Format amount for display with proper currency formatting.
+     * This can be extended later to support different currencies.
+     */
+    public function getFormattedAmountAttribute(): string
+    {
+        return number_format($this->amount / 100, 2);
+    }
+}
\ No newline at end of file
diff --git a/database/factories/BucketFactory.php b/database/factories/BucketFactory.php
index daa2e1f..3235250 100644
--- a/database/factories/BucketFactory.php
+++ b/database/factories/BucketFactory.php
@@ -40,6 +40,7 @@ public function definition(): array
             'sort_order' => $this->faker->numberBetween(0, 10),
             'allocation_type' => $allocationType,
             'allocation_value' => $this->getAllocationValueForType($allocationType),
+            'starting_amount' => $this->faker->numberBetween(0, 100000), // $0 to $1000 in cents
         ];
     }
 
@@ -92,6 +93,7 @@ public function defaultSet(): array
                 'sort_order' => 1,
                 'allocation_type' => BucketAllocationType::FIXED_LIMIT,
                 'allocation_value' => 0,
+                'starting_amount' => 0,
             ]),
             $this->state([
                 'name' => 'Emergency Fund',
@@ -99,6 +101,7 @@ public function defaultSet(): array
                 'sort_order' => 2,
                 'allocation_type' => BucketAllocationType::FIXED_LIMIT,
                 'allocation_value' => 0,
+                'starting_amount' => 0,
             ]),
             $this->state([
                 'name' => 'Investments',
@@ -106,6 +109,7 @@ public function defaultSet(): array
                 'sort_order' => 3,
                 'allocation_type' => BucketAllocationType::UNLIMITED,
                 'allocation_value' => null,
+                'starting_amount' => 0,
             ]),
         ];
     }
diff --git a/database/migrations/2025_12_29_205724_create_buckets_table.php b/database/migrations/2025_12_29_205724_create_buckets_table.php
index 03e74cd..b1dd390 100644
--- a/database/migrations/2025_12_29_205724_create_buckets_table.php
+++ b/database/migrations/2025_12_29_205724_create_buckets_table.php
@@ -17,6 +17,8 @@ public function up(): void
             $table->enum('allocation_type', ['fixed_limit', 'percentage', 'unlimited']);
             $table->decimal('allocation_value', 10, 2)->nullable()
                 ->comment('Limit amount for fixed_limit, percentage for percentage type, NULL for unlimited');
+            $table->unsignedBigInteger('starting_amount')->default(0)
+                ->comment('Initial amount in bucket in cents before any draws or outflows');
             $table->timestamps();
 
             // Indexes for performance
diff --git a/database/migrations/2025_12_30_202750_create_streams_table.php b/database/migrations/2025_12_30_202750_create_streams_table.php
index 2dddef2..8f5463f 100644
--- a/database/migrations/2025_12_30_202750_create_streams_table.php
+++ b/database/migrations/2025_12_30_202750_create_streams_table.php
@@ -14,7 +14,7 @@ public function up(): void
             $table->foreignId('bucket_id')->nullable()->constrained()->nullOnDelete();
             $table->string('name');
             $table->boolean('is_active')->default(true);
-            $table->decimal('amount', 12, 2);
+            $table->unsignedBigInteger('amount');
             $table->enum('type', ['income', 'expense']);
             $table->enum('frequency', ['once', 'weekly', 'biweekly', 'monthly', 'quarterly', 'yearly']);
             $table->date('start_date');