diff --git a/public/app.js b/public/app.js
index 1151163..b269baa 100644
--- a/public/app.js
+++ b/public/app.js
@@ -23,7 +23,10 @@ document.getElementById('leaseStart').addEventListener('change', (e) => {
   schedulePreview();
 });
 
-templateSelect.addEventListener('change', () => loadPreview());
+templateSelect.addEventListener('change', () => {
+  loadTemplateDefaults(templateSelect.value);
+  loadPreview();
+});
 
 let previewTimer = null;
 function schedulePreview() {
@@ -50,6 +53,7 @@ form.addEventListener('submit', async (event) => {
         monthlyRent: formData.get('monthlyRent'),
         paymentDay: formData.get('paymentDay'),
         deposit: formData.get('deposit'),
+        cleaningFee: formData.get('cleaningFee'),
         leaseStart: formData.get('leaseStart'),
         leaseEnd: formData.get('leaseEnd'),
       }),
@@ -119,6 +123,7 @@ async function loadTemplates() {
     }
 
     connectionStatus.textContent = '可使用';
+    loadTemplateDefaults(templateSelect.value);
     loadPreview();
   } catch (error) {
     templateSelect.append(new Option('讀取失敗', ''));
@@ -129,6 +134,19 @@ async function loadTemplates() {
   }
 }
 
+async function loadTemplateDefaults(name) {
+  if (!name) return;
+  try {
+    const res = await fetch(`/api/templates/${encodeURIComponent(name)}/defaults`);
+    if (!res.ok) return;
+    const defaults = await res.json();
+    if (defaults.monthlyRent) form.elements.monthlyRent.value = defaults.monthlyRent;
+    if (defaults.paymentDay)  form.elements.paymentDay.value  = defaults.paymentDay;
+    if (defaults.deposit)     form.elements.deposit.value     = defaults.deposit;
+    if (defaults.cleaningFee) form.elements.cleaningFee.value = defaults.cleaningFee;
+  } catch {}
+}
+
 let previewGen = 0;
 let previewAbortController = null;
 let previewBlobUrl = null;
@@ -151,6 +169,7 @@ async function loadPreview() {
     monthlyRent: formData.get('monthlyRent') || '',
     paymentDay:  formData.get('paymentDay')  || '',
     deposit:     formData.get('deposit')     || '',
+    cleaningFee: formData.get('cleaningFee') || '',
     leaseStart:  formData.get('leaseStart')  || '',
     leaseEnd:    formData.get('leaseEnd')    || '',
   });
diff --git a/public/index.html b/public/index.html
index 7a4829b..0c6c3c2 100644
--- a/public/index.html
+++ b/public/index.html
@@ -50,7 +50,7 @@
             </div>
 
             <div class="tool-panel fields-panel">
-              <div class="field-grid">
+              <div class="field-grid field-grid--2">
                 <label class="field">
                   <span>每月租金</span>
                   <input name="monthlyRent" type="number" inputmode="numeric" min="1" step="1" value="8000" required>
@@ -63,6 +63,10 @@
                   <span>保證金</span>
                   <input name="deposit" type="number" inputmode="numeric" min="1" step="1" value="16000" required>
                 </label>
+                <label class="field">
+                  <span>清潔費</span>
+                  <input name="cleaningFee" type="number" inputmode="numeric" min="1" step="1" value="1200" required>
+                </label>
               </div>
 
               <div class="field-grid field-grid--2">
diff --git a/server.js b/server.js
index cee47fb..35fc7c0 100644
--- a/server.js
+++ b/server.js
@@ -7,6 +7,8 @@ const {
   getTemplatePreviewPdf,
   saveTemplate,
   deleteTemplate,
+  getTemplateDefaults,
+  saveTemplateDefaults,
 } = require('./src/contractService');
 
 const app = express();
@@ -61,6 +63,14 @@ app.get('/api/templates', async (_req, res, next) => {
   }
 });
 
+app.get('/api/templates/:name/defaults', async (req, res, next) => {
+  try {
+    res.json(await getTemplateDefaults(req.params.name));
+  } catch (error) {
+    next(error);
+  }
+});
+
 app.get('/api/templates/:name/preview', async (req, res) => {
   try {
     const pdfBuffer = await getTemplatePreviewPdf(req.params.name, req.query);
@@ -82,10 +92,18 @@ app.post('/api/contracts/pdf', async (req, res) => {
       monthlyRent: req.body.monthlyRent,
       paymentDay: req.body.paymentDay,
       deposit: req.body.deposit,
+      cleaningFee: req.body.cleaningFee,
       leaseStart: req.body.leaseStart,
       leaseEnd: req.body.leaseEnd,
     });
 
+    await saveTemplateDefaults(req.body.template, {
+      monthlyRent: req.body.monthlyRent,
+      paymentDay: req.body.paymentDay,
+      deposit: req.body.deposit,
+      cleaningFee: req.body.cleaningFee,
+    }).catch(() => {});
+
     res.setHeader('Content-Type', 'application/pdf');
     res.setHeader(
       'Content-Disposition',
diff --git a/src/contractService.js b/src/contractService.js
index 4c7a518..1d3f355 100644
--- a/src/contractService.js
+++ b/src/contractService.js
@@ -20,6 +20,7 @@ const PLACEHOLDERS = [
   ['{{每月租金}}', 'monthlyRent', '每月租金', true],
   ['{{繳款日期}}', 'paymentDay', '繳款日期', true],
   ['{{保證金}}', 'deposit', '保證金', true],
+  ['{{清潔費}}', 'cleaningFee', '清潔費', true],
   ['{{租賃開始年}}', 'leaseStartYear', '租賃開始年', false],
   ['{{租賃開始月}}', 'leaseStartMonth', '租賃開始月', false],
   ['{{租賃開始日}}', 'leaseStartDay', '租賃開始日', false],
@@ -84,6 +85,7 @@ function normalizeContractInput(input) {
     monthlyRent: normalizePositiveInteger(input.monthlyRent, '每月租金'),
     paymentDay: normalizePaymentDay(input.paymentDay),
     deposit: normalizePositiveInteger(input.deposit, '保證金'),
+    cleaningFee: normalizePositiveInteger(input.cleaningFee, '清潔費'),
     leaseStartYear: String(start.rocYear),
     leaseStartMonth: String(start.month),
     leaseStartDay: String(start.day),
@@ -362,6 +364,7 @@ function buildPreviewValues(input) {
   if (input.monthlyRent) values.monthlyRent = String(input.monthlyRent);
   if (input.paymentDay) values.paymentDay = String(input.paymentDay);
   if (input.deposit) values.deposit = String(input.deposit);
+  if (input.cleaningFee) values.cleaningFee = String(input.cleaningFee);
 
   if (input.leaseStart && /^\d{4}-\d{2}-\d{2}$/.test(input.leaseStart)) {
     const [y, m, d] = input.leaseStart.split('-').map(Number);
@@ -424,6 +427,30 @@ async function getTemplatePreviewPdf(templateName, input = {}) {
   }
 }
 
+const DEFAULTS_FILE = path.resolve(TEMPLATE_DIR, 'defaults.json');
+const DEFAULT_CLEANING_FEE = '1200';
+
+async function getTemplateDefaults(templateName) {
+  try {
+    const raw = await fs.readFile(DEFAULTS_FILE, 'utf-8');
+    const all = JSON.parse(raw);
+    return { cleaningFee: DEFAULT_CLEANING_FEE, ...all[templateName] };
+  } catch {
+    return { cleaningFee: DEFAULT_CLEANING_FEE };
+  }
+}
+
+async function saveTemplateDefaults(templateName, values) {
+  let all = {};
+  try {
+    const raw = await fs.readFile(DEFAULTS_FILE, 'utf-8');
+    all = JSON.parse(raw);
+  } catch {}
+  all[templateName] = { ...all[templateName], ...values };
+  await fs.mkdir(TEMPLATE_DIR, { recursive: true });
+  await fs.writeFile(DEFAULTS_FILE, JSON.stringify(all, null, 2), 'utf-8');
+}
+
 async function saveTemplate(originalName, buffer) {
   const name = path.basename(String(originalName));
   if (!name) throwClientError('檔名不正確。');
@@ -447,4 +474,6 @@ module.exports = {
   getTemplatePreviewPdf,
   saveTemplate,
   deleteTemplate,
+  getTemplateDefaults,
+  saveTemplateDefaults,
 };
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