diff --git a/apps/app/src/components/timetable/PerformancePopover.vue b/apps/app/src/components/timetable/PerformancePopover.vue
index 018141d5..627991d4 100644
--- a/apps/app/src/components/timetable/PerformancePopover.vue
+++ b/apps/app/src/components/timetable/PerformancePopover.vue
@@ -126,7 +126,7 @@ function close(): void {
         >
           <div class="tt-popover__row">
             <span>Fee</span>
-            <span>€{{ (engagement.fee_amount ?? 0).toFixed(2) }}</span>
+            <span>€{{ Number(engagement.fee_amount ?? 0).toFixed(2) }}</span>
           </div>
           <div class="tt-popover__row">
             <span>Buma</span>
diff --git a/apps/app/src/schemas/timetable.ts b/apps/app/src/schemas/timetable.ts
index cb4bced8..e4a70e30 100644
--- a/apps/app/src/schemas/timetable.ts
+++ b/apps/app/src/schemas/timetable.ts
@@ -110,18 +110,23 @@ export const artistEngagementSchema = z.object({
     })
     .optional(),
   booking_status: enumLabel(artistEngagementStatusSchema),
-  fee_amount: z.number().nullable(),
+
+  // Decimal columns serialise as strings on the wire (Laravel default for
+  // `decimal(N,M)` without an explicit cast — preserves precision). The
+  // schema mirrors that; consumers that need arithmetic coerce via
+  // Number()/parseFloat at the use site.
+  fee_amount: z.string().nullable(),
   fee_currency: z.string(),
   fee_type: enumLabel(feeTypeSchema),
   buma_applicable: z.boolean(),
-  buma_percentage: z.number().nullable(),
+  buma_percentage: z.string().nullable(),
   buma_handled_by: enumLabel(bumaHandledBySchema),
   vat_applicable: z.boolean(),
-  vat_percentage: z.number().nullable(),
+  vat_percentage: z.string().nullable(),
   deal_breakdown: z
     .array(z.object({ label: z.string().optional(), amount: z.number() }))
     .nullable(),
-  deposit_percentage: z.number().nullable(),
+  deposit_percentage: z.string().nullable(),
   deposit_due_date: z.string().nullable(),
   balance_due_date: z.string().nullable(),
   payment_status: enumLabel(paymentStatusSchema),
diff --git a/apps/app/src/types/timetable.ts b/apps/app/src/types/timetable.ts
index 14b4688a..72fb233a 100644
--- a/apps/app/src/types/timetable.ts
+++ b/apps/app/src/types/timetable.ts
@@ -133,16 +133,22 @@ export interface ArtistEngagement {
   project_leader_id: string | null
   project_leader?: ArtistEngagementProjectLeader
   booking_status: EnumLabel<ArtistEngagementStatus>
-  fee_amount: number | null
+
+  /**
+   * Decimal-cast columns serialise as strings on the wire (Laravel default
+   * for `decimal(N,M)` without an explicit cast — preserves precision).
+   * Coerce via Number()/parseFloat at consumption sites that need arithmetic.
+   */
+  fee_amount: string | null
   fee_currency: string
   fee_type: EnumLabel<FeeType>
   buma_applicable: boolean
-  buma_percentage: number | null
+  buma_percentage: string | null
   buma_handled_by: EnumLabel<BumaHandledBy>
   vat_applicable: boolean
-  vat_percentage: number | null
+  vat_percentage: string | null
   deal_breakdown: DealBreakdownLine[] | null
-  deposit_percentage: number | null
+  deposit_percentage: string | null
   deposit_due_date: string | null
   balance_due_date: string | null
   payment_status: EnumLabel<PaymentStatus>
diff --git a/apps/app/tests/a11y/axe.test.ts b/apps/app/tests/a11y/axe.test.ts
index 37f51fa4..649e22c6 100644
--- a/apps/app/tests/a11y/axe.test.ts
+++ b/apps/app/tests/a11y/axe.test.ts
@@ -33,7 +33,7 @@ const engagement: Partial<ArtistEngagement> = {
   artist: { id: 'a1', name: 'Devin Wild' } as ArtistEngagement['artist'],
   booking_status: { value: ArtistEngagementStatus.CONFIRMED, label: 'Bevestigd' },
   computed: { buma_amount: 70, vat_grondslag: 1070, vat_amount: 224.7, breakdown_total: 0, total_cost: 1294.7 },
-  fee_amount: 1000,
+  fee_amount: '1000.00',
   advancing_completed_count: 3,
   advancing_total_count: 5,
 }
diff --git a/apps/app/tests/component/PerformanceBlock.test.ts b/apps/app/tests/component/PerformanceBlock.test.ts
index 02754202..9e1392fe 100644
--- a/apps/app/tests/component/PerformanceBlock.test.ts
+++ b/apps/app/tests/component/PerformanceBlock.test.ts
@@ -23,14 +23,14 @@ function makePerformance(overrides: Partial<Performance> = {}): Performance {
       event_id: 'ev1',
       booking_status: { value: ArtistEngagementStatus.CONFIRMED, label: 'Bevestigd' },
       project_leader_id: null,
-      fee_amount: 1000,
+      fee_amount: '1000.00',
       fee_currency: 'EUR',
       fee_type: { value: null, label: null },
       buma_applicable: true,
-      buma_percentage: 7,
+      buma_percentage: '7.00',
       buma_handled_by: { value: null, label: null },
       vat_applicable: true,
-      vat_percentage: 21,
+      vat_percentage: '21.00',
       deal_breakdown: null,
       deposit_percentage: null,
       deposit_due_date: null,