diff --git a/app/Actions/Tabulation/EnterBonusScore.php b/app/Actions/Tabulation/EnterBonusScore.php
new file mode 100644
index 0000000..042abe5
--- /dev/null
+++ b/app/Actions/Tabulation/EnterBonusScore.php
@@ -0,0 +1,75 @@
+<?php
+
+/** @noinspection PhpUnhandledExceptionInspection */
+
+namespace App\Actions\Tabulation;
+
+use App\Exceptions\ScoreEntryException;
+use App\Models\BonusScore;
+use App\Models\Entry;
+use App\Models\User;
+use Illuminate\Database\Eloquent\Collection;
+
+class EnterBonusScore
+{
+    public function __construct()
+    {
+    }
+
+    public function __invoke(User $judge, Entry $entry, int $score): void
+    {
+        $this->basicValidations($judge, $entry);
+        $this->validateJudgeValidity($judge, $entry, $score);
+        $entries = $this->getRelatedEntries($entry);
+
+        // Create the score for each related entry
+        foreach ($entries as $relatedEntry) {
+            BonusScore::create([
+                'entry_id' => $relatedEntry->id,
+                'user_id' => $judge->id,
+                'originally_scored_entry' => $entry->id,
+                'score' => $score,
+            ]);
+        }
+    }
+
+    protected function getRelatedEntries(Entry $entry): Collection
+    {
+        $bonusScore = $entry->audition->bonusScore->first();
+        $relatedAuditions = $bonusScore->auditions;
+
+        // Get all entries that have a student_id equal to that of entry and an audition_id in the related auditions
+        return Entry::where('student_id', $entry->student_id)
+            ->whereIn('audition_id', $relatedAuditions->pluck('id'))
+            ->get();
+    }
+
+    protected function basicValidations(User $judge, Entry $entry): void
+    {
+        if (! $judge->exists) {
+            throw new ScoreEntryException('Invalid judge provided');
+        }
+        if (! $entry->exists) {
+            throw new ScoreEntryException('Invalid entry provided');
+        }
+        if ($entry->audition->bonusScore->count() === 0) {
+            throw new ScoreEntryException('Entry does not have a bonus score');
+        }
+
+    }
+
+    protected function validateJudgeValidity(User $judge, Entry $entry, $score): void
+    {
+        if (BonusScore::where('entry_id', $entry->id)->where('user_id', $judge->id)->exists()) {
+            throw new ScoreEntryException('That judge has already scored that entry');
+        }
+
+        $bonusScore = $entry->audition->bonusScore->first();
+        if (! $bonusScore->judges->contains($judge)) {
+            throw new ScoreEntryException('That judge is not assigned to judge that bonus score');
+        }
+        if ($score > $bonusScore->max_score) {
+            throw new ScoreEntryException('That score exceeds the maximum');
+        }
+    }
+}
diff --git a/app/Models/BonusScore.php b/app/Models/BonusScore.php
index 6629a7f..f75fba5 100644
--- a/app/Models/BonusScore.php
+++ b/app/Models/BonusScore.php
@@ -2,10 +2,9 @@
 
 namespace App\Models;
 
-use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
 
 class BonusScore extends Model
 {
-    use HasFactory;
+    protected $guarded = [];
 }
diff --git a/app/Models/User.php b/app/Models/User.php
index eeb74cb..4c0a9ab 100644
--- a/app/Models/User.php
+++ b/app/Models/User.php
@@ -11,7 +11,6 @@ use Illuminate\Database\Eloquent\Relations\HasManyThrough;
 use Illuminate\Foundation\Auth\User as Authenticatable;
 use Illuminate\Notifications\Notifiable;
 use Illuminate\Support\Collection;
-use App\Models\ScoreSheet;
 
 class User extends Authenticatable implements MustVerifyEmail
 {
@@ -118,6 +117,11 @@ class User extends Authenticatable implements MustVerifyEmail
         return $this->rooms();
     }
 
+    public function bonusJudgingAssignments(): BelongsToMany
+    {
+        return $this->belongsToMany(BonusScoreDefinition::class, 'bonus_score_judge_assignment');
+    }
+
     public function advancementVotes(): HasMany
     {
         return $this->hasMany(JudgeAdvancementVote::class);
diff --git a/tests/Feature/Actions/EnterBonusScoreTest.php b/tests/Feature/Actions/EnterBonusScoreTest.php
new file mode 100644
index 0000000..f29af82
--- /dev/null
+++ b/tests/Feature/Actions/EnterBonusScoreTest.php
@@ -0,0 +1,134 @@
+<?php
+
+use App\Actions\Tabulation\EnterBonusScore;
+use App\Exceptions\ScoreEntryException;
+use App\Models\Audition;
+use App\Models\BonusScore;
+use App\Models\BonusScoreDefinition;
+use App\Models\Entry;
+use App\Models\Student;
+use App\Models\User;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Support\Facades\App;
+
+uses(RefreshDatabase::class);
+
+beforeEach(function () {
+    $this->enterBonusScore = App::make(EnterBonusScore::class);
+});
+
+it('rejects a non existent entry', function () {
+    $judge = User::factory()->create();
+    $entry = Entry::factory()->make();
+    $this->enterBonusScore->__invoke($judge, $entry, 42);
+})->throws(ScoreEntryException::class, 'Invalid entry provided');
+it('rejects a non existent judge', function () {
+    $judge = User::factory()->make();
+    $entry = Entry::factory()->create();
+    $this->enterBonusScore->__invoke($judge, $entry, 42);
+})->throws(ScoreEntryException::class, 'Invalid judge provided');
+it('rejects a submission if the entries audition does not have a bonus score', function () {
+    $judge = User::factory()->create();
+    $entry = Entry::factory()->create();
+    $this->enterBonusScore->__invoke($judge, $entry, 42);
+})->throws(ScoreEntryException::class, 'Entry does not have a bonus score');
+it('rejects a submission if the entry already has a score from the given judge', function () {
+    // Arrange
+    $judge = User::factory()->create();
+    $bonusScore = BonusScoreDefinition::factory()->create();
+    $entry = Entry::factory()->create();
+    $entry->audition->bonusScore()->attach($bonusScore->id);
+    $score = BonusScore::create([
+        'entry_id' => $entry->id,
+        'user_id' => $judge->id,
+        'originally_scored_entry' => $entry->id,
+        'score' => 42,
+    ]);
+    // Act & Assert
+    $this->enterBonusScore->__invoke($judge, $entry, 43);
+})->throws(ScoreEntryException::class, 'That judge has already scored that entry');
+it('rejects a submission for a judge not assigned to judge that bonus score', function () {
+    // Arrange
+    $judge = User::factory()->create();
+    $bonusScore = BonusScoreDefinition::factory()->create();
+    $entry = Entry::factory()->create();
+    $entry->audition->bonusScore()->attach($bonusScore->id);
+    // Act & Assert
+    $this->enterBonusScore->__invoke($judge, $entry, 43);
+})->throws(ScoreEntryException::class, 'That judge is not assigned to judge that bonus score');
+it('rejects a submission for a score that exceeds the maximum', function () {
+    // Arrange
+    $judge = User::factory()->create();
+    $bonusScore = BonusScoreDefinition::factory()->create(['max_score' => 50]);
+    $bonusScore->judges()->attach($judge);
+    $entry = Entry::factory()->create();
+    $entry->audition->bonusScore()->attach($bonusScore->id);
+    // Act & Assert
+    $this->enterBonusScore->__invoke($judge, $entry, 51);
+})->throws(ScoreEntryException::class, 'That score exceeds the maximum');
+
+it('records a valid bonus score submission on the submitted entry', function () {
+    // Arrange
+    $judge = User::factory()->create();
+    $bonusScore = BonusScoreDefinition::factory()->create(['max_score' => 100]);
+    $entry = Entry::factory()->create();
+    $entry->audition->bonusScore()->attach($bonusScore->id);
+    $bonusScore->judges()->attach($judge);
+    // Act & Assert
+    $this->enterBonusScore->__invoke($judge, $entry, 42);
+    expect(
+        BonusScore::where('entry_id', $entry->id)
+            ->where('user_id', $judge->id)
+            ->where('score', 42)->exists())
+        ->toBeTrue();
+});
+it('records a valid bonus score on all related entries', function () {
+    // Arrange
+    $judge = User::factory()->create();
+    $bonusScore = BonusScoreDefinition::factory()->create(['name' => 'Saxophone Improvisation', 'max_score' => 100]);
+    $bonusScore->judges()->attach($judge);
+    $jazzAltoAudition = Audition::factory()->create(['name' => 'Jazz Alto Saxophone']);
+    $jazzTenorAudition = Audition::factory()->create(['name' => 'Jazz Tenor Saxophone']);
+    $jazzBariAudition = Audition::factory()->create(['name' => 'Jazz Bari Saxophone']);
+    $bonusScore->auditions()->attach($jazzAltoAudition->id);
+    $bonusScore->auditions()->attach($jazzTenorAudition->id);
+    $bonusScore->auditions()->attach($jazzBariAudition->id);
+    $saxStudent = Student::factory()->create();
+    $jazzAltoEntry = Entry::factory()->create([
+        'student_id' => $saxStudent->id, 'audition_id' => $jazzAltoAudition->id,
+    ]);
+    $jazzTenorEntry = Entry::factory()->create(['student_id' => $saxStudent->id,
+        'audition_id' => $jazzTenorAudition->id,
+    ]);
+    $jazzBariEntry = Entry::factory()->create(['student_id' => $saxStudent->id, 'audition_id' => $jazzBariAudition->id,
+    ]);
+    Entry::factory()->count(4)->create(['audition_id' => $jazzAltoAudition->id]);
+    Entry::factory()->count(4)->create(['audition_id' => $jazzTenorAudition->id]);
+    Entry::factory()->count(4)->create(['audition_id' => $jazzBariAudition->id]);
+    // Act
+    $this->enterBonusScore->__invoke($judge, $jazzAltoEntry, 42);
+    // Assert
+    expect(
+        BonusScore::where('entry_id', $jazzAltoEntry->id)
+            ->where('user_id', $judge->id)
+            ->where('originally_scored_entry', $jazzAltoEntry->id)
+            ->where('score', 42)->exists())
+        ->toBeTrue()
+
+        ->and(BonusScore::count())->toBe(3)
+
+        ->and(
+            BonusScore::where('entry_id', $jazzTenorEntry->id)
+                ->where('user_id', $judge->id)
+                ->where('originally_scored_entry', $jazzAltoEntry->id)
+                ->where('score', 42)->exists())
+        ->toBeTrue()
+
+        ->and(
+            BonusScore::where('entry_id', $jazzBariEntry->id)
+                ->where('user_id', $judge->id)
+                ->where('originally_scored_entry', $jazzAltoEntry->id)
+                ->where('score', 42)->exists())
+        ->toBeTrue();
+
+});