diff --git a/README.md b/README.md
index f41c193..4f315e3 100644
--- a/README.md
+++ b/README.md
@@ -28,6 +28,20 @@ docker compose up --build
 
 운영 전 `SESSION_SECRET`과 DB 비밀번호를 반드시 변경하세요.
 
+## 주요 명령
+
+```bash
+npm run dev
+npm run build
+npm run preview
+npm run db:generate
+npm run db:migrate
+npm run db:deploy
+npm run db:seed
+```
+
+현재 별도 lint/test 스크립트는 아직 없습니다. 빌드 락이 걸린 개발 환경에서는 `NUXT_IGNORE_LOCK=1 npm run build`로 검증합니다.
+
 ## 문서
 
 - [요구사항](docs/requirements.md)
diff --git a/components/TransactionListRow.vue b/components/TransactionListRow.vue
index e7afe75..7d56774 100644
--- a/components/TransactionListRow.vue
+++ b/components/TransactionListRow.vue
@@ -5,11 +5,11 @@
     class="grid grid-cols-[2.5rem_minmax(0,1fr)_auto] items-start gap-3 px-4 py-3 active:bg-paper md:px-5"
   >
     <div
-      class="mt-0.5 flex h-10 w-10 items-center justify-center rounded-md bg-paper text-sm font-bold"
-      :class="transaction.type === 'income' ? 'text-brand-700' : 'text-muted'"
+      class="mt-0.5 flex h-10 w-10 items-center justify-center rounded-md text-sm font-extrabold"
+      :style="categoryIconStyle"
       aria-hidden="true"
     >
-      {{ categoryInitial }}
+      {{ categoryIconGlyph }}
     </div>
 
     <div class="min-w-0">
@@ -35,6 +35,7 @@
 
 <script setup lang="ts">
 import type { Transaction } from '~/composables/useMoney'
+import { categoryColor, categoryGlyph } from '~/utils/categoryPresentation'
 
 const props = defineProps<{
   transaction: Transaction
@@ -48,10 +49,18 @@ const categoryLabel = computed(() => {
   return category.name
 })
 
-const categoryInitial = computed(() => {
+const presentationCategory = computed(() => {
   const category = props.transaction.category
-  const name = category.parent?.name || category.name || (props.transaction.type === 'income' ? '수' : '지')
-  return name.slice(0, 1)
+  return category.icon || category.color ? category : category.parent || category
+})
+
+const categoryIconGlyph = computed(() => categoryGlyph(presentationCategory.value.icon))
+const categoryIconStyle = computed(() => {
+  const color = categoryColor(presentationCategory.value.color)
+  return {
+    color,
+    backgroundColor: `${color}14`
+  }
 })
 
 const metaLine = computed(() => {
diff --git a/composables/useMoney.ts b/composables/useMoney.ts
index 4d8f54d..4ac34c9 100644
--- a/composables/useMoney.ts
+++ b/composables/useMoney.ts
@@ -15,6 +15,8 @@ export interface Category {
   id: string
   type: TransactionType
   name: string
+  icon: string
+  color: string
   parentId: string | null
   sortOrder: number
   active: boolean
diff --git a/docs/changelog.md b/docs/changelog.md
index 1d14ae9..46dd69f 100644
--- a/docs/changelog.md
+++ b/docs/changelog.md
@@ -41,3 +41,8 @@
 - 공유 링크 생성, 목록 조회, 삭제 API를 추가했다.
 - 만료 기간이 있는 공개 읽기 전용 공유 화면을 추가했다.
 - 설정 화면에 계정 관리, 로그아웃, 공유 링크 관리 화면을 추가했다.
+- 카테고리에 아이콘과 색상 필드를 추가하고 Prisma migration을 추가했다.
+- 카테고리 관리 화면에서 상위/하위 목록을 거쳐 카테고리 상세 정보를 수정할 수 있도록 했다.
+- 거래 목록의 카테고리 아이콘 자리를 카테고리별 아이콘/색상 설정과 연결했다.
+- 거래 입력/수정의 카테고리 선택을 실제 선택 가능한 최종 카테고리 중심으로 정리했다.
+- README에 개발, 빌드, Prisma 관련 주요 명령과 현재 검증 기준을 정리했다.
diff --git a/docs/project-guidelines.md b/docs/project-guidelines.md
index f6dd73a..3a250c9 100644
--- a/docs/project-guidelines.md
+++ b/docs/project-guidelines.md
@@ -21,6 +21,7 @@
 - 통계 화면은 그래프보다 숫자와 분류별 리스트를 우선한다.
 - 방향 이동 UI는 `assets/icons`의 키보드 화살표 SVG를 사용한다.
 - 거래 목록의 카테고리 표시는 하위 카테고리가 있으면 하위 이름만, 없으면 상위 이름만 보여준다.
+- 카테고리 아이콘과 색상은 카테고리 관리 상세 화면에서 수정하고 거래 목록 아이콘에 즉시 반영한다.
 
 ## 데이터 기준
 
@@ -28,6 +29,7 @@
 - Prisma migration은 저장소에 포함한다.
 - 자산 잔액은 현재값을 저장하지 않고 거래 합계로 계산한다.
 - 카테고리와 자산은 완전 삭제보다 비활성화를 우선한다.
+- 거래에 연결되는 카테고리 선택은 하위가 있으면 하위 카테고리를 우선하고, 하위가 없는 경우에만 상위 카테고리를 직접 선택한다.
 - CSV Export는 데이터 보존을 위한 필수 기능으로 유지한다.
 
 ## 개발/운영 기준
diff --git a/pages/add.vue b/pages/add.vue
index e6bba85..30d540c 100644
--- a/pages/add.vue
+++ b/pages/add.vue
@@ -113,17 +113,21 @@ const assetOptions = computed(() => assets.value.map((asset: any) => ({
   label: asset.name,
   description: asset.balanceType === 'cumulative' ? '계속 누적' : '매월 새로 시작'
 })))
-const categoryOptions = computed(() => filteredCategories.value.map((category: any) => ({
+const selectableCategories = computed(() => {
+  const activeIdsWithChildren = new Set(filteredCategories.value.filter((category: any) => category.parentId).map((category: any) => category.parentId))
+  return filteredCategories.value.filter((category: any) => !activeIdsWithChildren.has(category.id))
+})
+const categoryOptions = computed(() => selectableCategories.value.map((category: any) => ({
   value: category.id,
   label: category.name,
-  description: category.type === 'income' ? '수입' : '지출'
+  description: category.parent?.name || (category.type === 'income' ? '수입' : '지출')
 })))
 
 watch(assets, (items: any[]) => {
   if (!form.assetId && items[0]) form.assetId = items[0].id
 }, { immediate: true })
 
-watch(filteredCategories, (items: any[]) => {
+watch(selectableCategories, (items: any[]) => {
   if (!items.some(item => item.id === form.categoryId)) form.categoryId = items[0]?.id || ''
 }, { immediate: true })
 
diff --git a/pages/settings.vue b/pages/settings.vue
index c4f6c76..3c93478 100644
--- a/pages/settings.vue
+++ b/pages/settings.vue
@@ -155,8 +155,61 @@
       </div>
     </div>
 
-    <div v-else class="py-4">
-      <div v-if="!selectedParentCategory" class="px-4">
+    <div v-else-if="view === 'categories'" class="py-4">
+      <form v-if="selectedCategory" class="px-4" @submit.prevent="saveCategory">
+        <section class="space-y-5 border-y border-line bg-white px-4 py-4">
+          <div class="grid grid-cols-[4.5rem_1fr] items-center gap-3">
+            <label class="text-sm font-semibold text-muted" for="categoryName">이름</label>
+            <input id="categoryName" v-model="categoryEditForm.name" class="field border-0 bg-transparent font-semibold shadow-none focus:ring-0" required>
+          </div>
+
+          <div class="grid grid-cols-[4.5rem_1fr] items-start gap-3">
+            <span class="pt-2 text-sm font-semibold text-muted">아이콘</span>
+            <div class="grid grid-cols-5 gap-2 sm:grid-cols-7">
+              <button
+                v-for="option in categoryIconOptions"
+                :key="option.value"
+                type="button"
+                class="flex h-10 items-center justify-center rounded-md border text-sm font-extrabold"
+                :class="categoryEditForm.icon === option.value ? 'border-brand-700 bg-brand-50 text-brand-700' : 'border-line text-muted'"
+                @click="categoryEditForm.icon = option.value"
+              >
+                {{ option.glyph }}
+              </button>
+            </div>
+          </div>
+
+          <div class="grid grid-cols-[4.5rem_1fr] items-start gap-3">
+            <span class="pt-2 text-sm font-semibold text-muted">색상</span>
+            <div class="flex flex-wrap gap-2">
+              <button
+                v-for="color in categoryColorOptions"
+                :key="color"
+                type="button"
+                class="h-9 w-9 rounded-full border-2"
+                :class="categoryEditForm.color === color ? 'border-ink' : 'border-transparent'"
+                :style="{ backgroundColor: color }"
+                :aria-label="color"
+                @click="categoryEditForm.color = color"
+              />
+            </div>
+          </div>
+
+          <div class="grid grid-cols-[4.5rem_1fr] items-center gap-3">
+            <span class="text-sm font-semibold text-muted">유형</span>
+            <p class="font-semibold">{{ selectedCategory.type === 'income' ? '수입' : '지출' }}</p>
+          </div>
+
+          <div class="grid grid-cols-[4.5rem_1fr] items-center gap-3">
+            <span class="text-sm font-semibold text-muted">위치</span>
+            <p class="font-semibold">{{ selectedCategory.parent?.name || '상위 카테고리' }}</p>
+          </div>
+        </section>
+
+        <button class="btn-primary mt-5 w-full" type="submit">저장하기</button>
+      </form>
+
+      <div v-else-if="!selectedParentCategory" class="px-4">
         <div class="segmented">
           <button
             type="button"
@@ -177,7 +230,28 @@
         </div>
       </div>
 
-      <div class="mt-4 divide-y divide-line border-y border-line bg-white">
+      <div v-if="!selectedCategory" class="mt-4 divide-y divide-line border-y border-line bg-white">
+        <button
+          v-if="selectedParentCategory"
+          type="button"
+          class="flex w-full items-center justify-between px-4 py-4 text-left active:bg-paper"
+          @click="openCategoryDetail(selectedParentCategory)"
+        >
+          <span class="flex min-w-0 items-center gap-3">
+            <span
+              class="flex h-9 w-9 shrink-0 items-center justify-center rounded-md text-sm font-extrabold"
+              :style="categoryStyle(selectedParentCategory)"
+            >
+              {{ categoryIcon(selectedParentCategory) }}
+            </span>
+            <span class="min-w-0">
+              <span class="block truncate text-base font-semibold text-ink">상위 카테고리 설정</span>
+              <span class="mt-1 block truncate text-xs text-muted">{{ selectedParentCategory.name }}</span>
+            </span>
+          </span>
+          <img class="h-6 w-6 opacity-60" src="~/assets/icons/keyboard_arrow_right.svg" alt="">
+        </button>
+
         <button
           v-for="category in visibleCategories"
           :key="category.id"
@@ -185,11 +259,19 @@
           class="flex w-full items-center justify-between px-4 py-4 text-left active:bg-paper"
           @click="selectCategory(category)"
         >
-          <span>
-            <span class="block text-base font-semibold text-ink">{{ category.name }}</span>
-            <span class="mt-1 block text-xs text-muted">{{ categoryDescription(category) }}</span>
+          <span class="flex min-w-0 items-center gap-3">
+            <span
+              class="flex h-9 w-9 shrink-0 items-center justify-center rounded-md text-sm font-extrabold"
+              :style="categoryStyle(category)"
+            >
+              {{ categoryIcon(category) }}
+            </span>
+            <span class="min-w-0">
+              <span class="block truncate text-base font-semibold text-ink">{{ category.name }}</span>
+              <span class="mt-1 block truncate text-xs text-muted">{{ categoryDescription(category) }}</span>
+            </span>
           </span>
-          <img v-if="!selectedParentCategory" class="h-6 w-6 opacity-60" src="~/assets/icons/keyboard_arrow_right.svg" alt="">
+          <img class="h-6 w-6 opacity-60" src="~/assets/icons/keyboard_arrow_right.svg" alt="">
         </button>
 
         <p v-if="!visibleCategories.length" class="px-4 py-12 text-center text-muted">
@@ -226,6 +308,7 @@
 
 <script setup lang="ts">
 import { format } from 'date-fns'
+import { CATEGORY_COLOR_OPTIONS, CATEGORY_ICON_OPTIONS, categoryColor, categoryGlyph } from '~/utils/categoryPresentation'
 
 type SettingsView = 'home' | 'account' | 'sharing' | 'assets' | 'categories'
 type CategoryType = 'income' | 'expense'
@@ -234,6 +317,7 @@ const view = ref<SettingsView>('home')
 const session = useState<{ id: string; email: string; name: string } | null>('session')
 const categoryType = ref<CategoryType>('expense')
 const selectedParentId = ref('')
+const selectedCategoryId = ref('')
 const addSheetOpen = ref(false)
 const categoryName = ref('')
 const { data: assetData, refresh: refreshAssets } = await useFetch('/api/assets', { query: { includeInactive: true } })
@@ -257,11 +341,19 @@ const shareForm = reactive({
   name: '',
   days: 7
 })
+const categoryEditForm = reactive({
+  name: '',
+  icon: 'circle',
+  color: '#6b7673'
+})
+const categoryIconOptions = CATEGORY_ICON_OPTIONS
+const categoryColorOptions = CATEGORY_COLOR_OPTIONS
 
 const title = computed(() => {
   if (view.value === 'account') return '계정 관리'
   if (view.value === 'sharing') return '공유 링크 관리'
   if (view.value === 'assets') return '자산 관리'
+  if (selectedCategory.value) return '카테고리 정보'
   if (selectedParentCategory.value) return selectedParentCategory.value.name
   if (view.value === 'categories') return '카테고리 관리'
   return '설정'
@@ -270,6 +362,7 @@ const assets = computed(() => assetData.value || [])
 const categories = computed(() => categoryData.value || [])
 const shareLinks = computed(() => shareLinkData.value || [])
 const selectedParentCategory = computed(() => categories.value.find((category: any) => category.id === selectedParentId.value))
+const selectedCategory = computed(() => categories.value.find((category: any) => category.id === selectedCategoryId.value))
 const categoryTypeLabel = computed(() => categoryType.value === 'income' ? '수입' : '지출')
 const visibleCategories = computed(() => {
   if (selectedParentId.value) {
@@ -287,14 +380,29 @@ const addSheetTitle = computed(() => selectedParentCategory.value ? `${selectedP
 
 watch(categoryType, () => {
   selectedParentId.value = ''
+  selectedCategoryId.value = ''
+})
+
+watch(selectedCategory, (category: any) => {
+  if (!category) return
+  Object.assign(categoryEditForm, {
+    name: category.name,
+    icon: category.icon || 'circle',
+    color: category.color || '#6b7673'
+  })
 })
 
 function open(nextView: SettingsView) {
   view.value = nextView
   selectedParentId.value = ''
+  selectedCategoryId.value = ''
 }
 
 function goBack() {
+  if (selectedCategoryId.value) {
+    selectedCategoryId.value = ''
+    return
+  }
   if (selectedParentId.value) {
     selectedParentId.value = ''
     return
@@ -308,16 +416,35 @@ function openAddSheet() {
 }
 
 function selectCategory(category: any) {
-  if (selectedParentId.value) return
+  if (selectedParentId.value) {
+    openCategoryDetail(category)
+    return
+  }
   selectedParentId.value = category.id
 }
 
+function openCategoryDetail(category: any) {
+  selectedCategoryId.value = category.id
+}
+
 function categoryDescription(category: any) {
-  if (selectedParentId.value) return categoryTypeLabel.value
+  if (selectedParentId.value) return '하위 카테고리'
   const childCount = categories.value.filter((item: any) => item.parentId === category.id).length
   return `${childCount}개 하위 카테고리`
 }
 
+function categoryIcon(category: any) {
+  return categoryGlyph(category.icon)
+}
+
+function categoryStyle(category: any) {
+  const color = categoryColor(category.color)
+  return {
+    color,
+    backgroundColor: `${color}14`
+  }
+}
+
 async function createAsset() {
   await $fetch('/api/assets', { method: 'POST', body: assetForm })
   Object.assign(assetForm, { name: '', balanceType: 'cumulative', initialBalance: 0 })
@@ -335,7 +462,9 @@ async function createCategory() {
     body: {
       type: categoryType.value,
       parentId: selectedParentId.value || '',
-      name: categoryName.value
+      name: categoryName.value,
+      icon: selectedParentCategory.value?.icon || 'circle',
+      color: selectedParentCategory.value?.color || '#6b7673'
     }
   })
   categoryName.value = ''
@@ -343,6 +472,16 @@ async function createCategory() {
   await refreshCategories()
 }
 
+async function saveCategory() {
+  if (!selectedCategory.value) return
+  await $fetch(`/api/categories/${selectedCategory.value.id}`, {
+    method: 'PATCH',
+    body: categoryEditForm
+  })
+  await refreshCategories()
+  selectedCategoryId.value = ''
+}
+
 async function createShareLink() {
   await $fetch('/api/share-links', {
     method: 'POST',
diff --git a/pages/transactions/[id].vue b/pages/transactions/[id].vue
index c092784..8ea127f 100644
--- a/pages/transactions/[id].vue
+++ b/pages/transactions/[id].vue
@@ -114,10 +114,14 @@ const assetOptions = computed(() => assets.value.map((asset: any) => ({
   label: asset.name,
   description: asset.balanceType === 'cumulative' ? '계속 누적' : '매월 새로 시작'
 })))
-const categoryOptions = computed(() => filteredCategories.value.map((category: any) => ({
+const selectableCategories = computed(() => {
+  const activeIdsWithChildren = new Set(filteredCategories.value.filter((category: any) => category.parentId).map((category: any) => category.parentId))
+  return filteredCategories.value.filter((category: any) => !activeIdsWithChildren.has(category.id))
+})
+const categoryOptions = computed(() => selectableCategories.value.map((category: any) => ({
   value: category.id,
   label: category.name,
-  description: category.type === 'income' ? '수입' : '지출'
+  description: category.parent?.name || (category.type === 'income' ? '수입' : '지출')
 })))
 const locationLabel = computed(() => form.latitude && form.longitude)
 const mapsUrl = computed(() => `https://www.google.com/maps?q=${form.latitude},${form.longitude}`)
@@ -137,7 +141,7 @@ watch(transaction, (value) => {
   })
 }, { immediate: true })
 
-watch(filteredCategories, (items: any[]) => {
+watch(selectableCategories, (items: any[]) => {
   if (!items.some(item => item.id === form.categoryId)) form.categoryId = items[0]?.id || ''
 })
 
diff --git a/prisma/migrations/20260813093000_add_category_presentation/migration.sql b/prisma/migrations/20260813093000_add_category_presentation/migration.sql
new file mode 100644
index 0000000..ccaf31c
--- /dev/null
+++ b/prisma/migrations/20260813093000_add_category_presentation/migration.sql
@@ -0,0 +1,3 @@
+ALTER TABLE "Category"
+ADD COLUMN "icon" TEXT NOT NULL DEFAULT 'circle',
+ADD COLUMN "color" TEXT NOT NULL DEFAULT '#6b7673';
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index c7ff3ec..68a1859 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -62,6 +62,8 @@ model Category {
   userId    String
   type      TransactionType
   name      String
+  icon      String          @default("circle")
+  color     String          @default("#6b7673")
   parentId  String?
   sortOrder Int             @default(0)
   active    Boolean         @default(true)
diff --git a/server/api/categories/[id].patch.ts b/server/api/categories/[id].patch.ts
index ff3507b..0da0e62 100644
--- a/server/api/categories/[id].patch.ts
+++ b/server/api/categories/[id].patch.ts
@@ -1,19 +1,42 @@
 import { readBody, getRouterParam, createError } from 'h3'
 import { prisma } from '../../utils/db'
 import { requireUser } from '../../utils/auth'
+import { CATEGORY_COLOR_OPTIONS, CATEGORY_ICON_OPTIONS } from '../../../utils/categoryPresentation'
+
+function validIcon(value?: string) {
+  return CATEGORY_ICON_OPTIONS.some(option => option.value === value)
+}
+
+function validColor(value?: string) {
+  return CATEGORY_COLOR_OPTIONS.includes(value || '')
+}
 
 export default defineEventHandler(async (event) => {
   const user = await requireUser(event)
   const id = getRouterParam(event, 'id')!
-  const body = await readBody<{ name?: string; active?: boolean; sortOrder?: number }>(event)
+  const body = await readBody<{ name?: string; icon?: string; color?: string; active?: boolean; sortOrder?: number }>(event)
 
   const category = await prisma.category.findFirst({ where: { id, userId: user.id } })
   if (!category) throw createError({ statusCode: 404, statusMessage: 'Category not found' })
 
+  if (body.name !== undefined && !body.name.trim()) {
+    throw createError({ statusCode: 400, statusMessage: 'Category name is required' })
+  }
+
+  if (body.icon !== undefined && !validIcon(body.icon)) {
+    throw createError({ statusCode: 400, statusMessage: 'Invalid category icon' })
+  }
+
+  if (body.color !== undefined && !validColor(body.color)) {
+    throw createError({ statusCode: 400, statusMessage: 'Invalid category color' })
+  }
+
   return prisma.category.update({
     where: { id },
     data: {
       ...(body.name !== undefined ? { name: body.name.trim() } : {}),
+      ...(body.icon !== undefined ? { icon: body.icon } : {}),
+      ...(body.color !== undefined ? { color: body.color } : {}),
       ...(body.active !== undefined ? { active: body.active } : {}),
       ...(body.sortOrder !== undefined ? { sortOrder: body.sortOrder } : {})
     }
diff --git a/server/api/categories/index.post.ts b/server/api/categories/index.post.ts
index f22f0c1..dbe933a 100644
--- a/server/api/categories/index.post.ts
+++ b/server/api/categories/index.post.ts
@@ -1,25 +1,46 @@
 import { readBody, createError } from 'h3'
 import { prisma } from '../../utils/db'
 import { requireUser } from '../../utils/auth'
+import { CATEGORY_COLOR_OPTIONS, CATEGORY_ICON_OPTIONS } from '../../../utils/categoryPresentation'
+
+function validIcon(value?: string) {
+  return CATEGORY_ICON_OPTIONS.some(option => option.value === value) ? value : 'circle'
+}
+
+function validColor(value?: string) {
+  return CATEGORY_COLOR_OPTIONS.includes(value || '') ? value : '#6b7673'
+}
 
 export default defineEventHandler(async (event) => {
   const user = await requireUser(event)
-  const body = await readBody<{ type: 'income' | 'expense'; name: string; parentId?: string }>(event)
+  const body = await readBody<{ type: 'income' | 'expense'; name: string; parentId?: string; icon?: string; color?: string }>(event)
+  let type = body.type
+
+  if (!body.name?.trim()) {
+    throw createError({ statusCode: 400, statusMessage: 'Category name is required' })
+  }
+
+  if (!body.parentId && type !== 'income' && type !== 'expense') {
+    throw createError({ statusCode: 400, statusMessage: 'Invalid category type' })
+  }
 
   if (body.parentId) {
     const parent = await prisma.category.findFirst({ where: { id: body.parentId, userId: user.id } })
     if (!parent || parent.parentId) {
       throw createError({ statusCode: 400, statusMessage: 'Only two category levels are allowed' })
     }
+    type = parent.type
   }
 
-  const count = await prisma.category.count({ where: { userId: user.id, type: body.type, parentId: body.parentId || null } })
+  const count = await prisma.category.count({ where: { userId: user.id, type, parentId: body.parentId || null } })
 
   return prisma.category.create({
     data: {
       userId: user.id,
-      type: body.type,
+      type,
       name: body.name.trim(),
+      icon: validIcon(body.icon),
+      color: validColor(body.color),
       parentId: body.parentId || null,
       sortOrder: count
     }
diff --git a/server/utils/defaults.ts b/server/utils/defaults.ts
index de5798c..e5d50bd 100644
--- a/server/utils/defaults.ts
+++ b/server/utils/defaults.ts
@@ -12,24 +12,24 @@ export async function createDefaultMoneyData(prisma: PrismaClient, userId: strin
   })
 
   const incomeParent = await prisma.category.create({
-    data: { userId, type: 'income', name: '근로', sortOrder: 0 }
+    data: { userId, type: 'income', name: '근로', icon: 'work', color: '#2563eb', sortOrder: 0 }
   })
   await prisma.category.create({
-    data: { userId, type: 'income', name: '월급', parentId: incomeParent.id, sortOrder: 0 }
+    data: { userId, type: 'income', name: '월급', icon: 'salary', color: '#2563eb', parentId: incomeParent.id, sortOrder: 0 }
   })
 
   const foodParent = await prisma.category.create({
-    data: { userId, type: 'expense', name: '식비', sortOrder: 0 }
+    data: { userId, type: 'expense', name: '식비', icon: 'food', color: '#f97316', sortOrder: 0 }
   })
   await prisma.category.create({
-    data: { userId, type: 'expense', name: '외식', parentId: foodParent.id, sortOrder: 0 }
+    data: { userId, type: 'expense', name: '외식', icon: 'food', color: '#f97316', parentId: foodParent.id, sortOrder: 0 }
   })
 
   const livingParent = await prisma.category.create({
-    data: { userId, type: 'expense', name: '생활', sortOrder: 1 }
+    data: { userId, type: 'expense', name: '생활', icon: 'shopping', color: '#ef4444', sortOrder: 1 }
   })
   await prisma.category.create({
-    data: { userId, type: 'expense', name: '마트', parentId: livingParent.id, sortOrder: 0 }
+    data: { userId, type: 'expense', name: '마트', icon: 'shopping', color: '#ef4444', parentId: livingParent.id, sortOrder: 0 }
   })
 
   return { cash }
diff --git a/todo.md b/todo.md
index a0a459f..a7be5df 100644
--- a/todo.md
+++ b/todo.md
@@ -12,7 +12,6 @@
 ## 2. 내역 화면
 
 - 날짜별 수입/지출 표시가 좁은 화면에서도 겹치지 않도록 최종 조정한다.
-- 거래 행 왼쪽 아이콘을 카테고리별 아이콘으로 표시한다.
 - 거래 취소/환불 같은 상태 표시 규칙을 정한다.
 
 ## 3. 거래 입력/수정
@@ -26,8 +25,6 @@
 
 ## 4. 카테고리
 
-- 카테고리별 아이콘 설정 기능을 구현한다.
-- 카테고리별 색상 설정 기능을 구현한다.
 - 상위 카테고리와 하위 카테고리의 추가, 수정, 삭제 화면을 완성한다.
 - 카테고리 정렬 순서 변경 기능을 추가한다.
 - 사용 중인 카테고리 삭제 시 처리 규칙을 정한다.
@@ -53,15 +50,12 @@
 
 - 설정 홈의 항목 구성을 다시 정리한다.
 - 자산 관리 화면을 추가/수정/삭제가 명확한 상세 구조로 바꾼다.
-- 카테고리 관리 화면의 추가/수정 흐름을 더 단순화한다.
 - 주 화폐, 월 시작일, 주간 시작일 같은 기본 설정 항목을 구현한다.
 - 설정 변경이 실제 화면 계산과 표시 방식에 반영되도록 연결한다.
 
 ## 8. 데이터와 API
 
 - 거래 API에서 이체 타입을 지원한다.
-- 검색과 필터용 API query를 추가한다.
-- 카테고리 아이콘/색상 필드를 Prisma schema에 추가한다.
 - 사용자 설정 테이블을 추가한다.
 - 거래 목록 조회 성능을 고려해 필요한 index를 점검한다.
 - CSV 내보내기 컬럼을 실제 사용 흐름에 맞게 정리한다.
@@ -85,4 +79,3 @@
 - 거래 생성, 수정, 삭제 API 테스트를 추가한다.
 - 카테고리와 자산 API 테스트를 추가한다.
 - 주요 모바일 화면을 Playwright로 스모크 테스트한다.
-- 빌드, lint, 테스트 명령을 README에 정리한다.
diff --git a/utils/categoryPresentation.ts b/utils/categoryPresentation.ts
new file mode 100644
index 0000000..1d51176
--- /dev/null
+++ b/utils/categoryPresentation.ts
@@ -0,0 +1,29 @@
+export const CATEGORY_ICON_OPTIONS = [
+  { value: 'circle', label: '기본', glyph: '●' },
+  { value: 'food', label: '식비', glyph: '식' },
+  { value: 'shopping', label: '쇼핑', glyph: '쇼' },
+  { value: 'home', label: '주거', glyph: '집' },
+  { value: 'transport', label: '교통', glyph: '차' },
+  { value: 'health', label: '건강', glyph: '건' },
+  { value: 'work', label: '근로', glyph: '근' },
+  { value: 'salary', label: '급여', glyph: '월' },
+  { value: 'gift', label: '기타', glyph: '기' }
+]
+
+export const CATEGORY_COLOR_OPTIONS = [
+  '#ef4444',
+  '#f97316',
+  '#eab308',
+  '#14b8a6',
+  '#2563eb',
+  '#8b5cf6',
+  '#6b7673'
+]
+
+export function categoryGlyph(icon?: string | null) {
+  return CATEGORY_ICON_OPTIONS.find(option => option.value === icon)?.glyph || CATEGORY_ICON_OPTIONS[0].glyph
+}
+
+export function categoryColor(color?: string | null) {
+  return CATEGORY_COLOR_OPTIONS.includes(color || '') ? color! : CATEGORY_COLOR_OPTIONS[6]
+}