diff --git a/docs/ARCHITEKTUR.md b/docs/ARCHITEKTUR.md
index 89cffde..813c9ee 100644
--- a/docs/ARCHITEKTUR.md
+++ b/docs/ARCHITEKTUR.md
@@ -179,7 +179,7 @@ sequenceDiagram
   IM->>IM: _find_or_create_account(bank, iban)
   IM->>DB: INSERT Statement(status="draft")
 
-  opt Saldo pruefbar (PDF immer; CSV nur VR: balance_checkable=True)
+  opt Saldo pruefbar (PDF immer, CSV nur VR: balance_checkable=True)
     IM->>VA: balance_difference(parsed)
     Note right of IM: Differenz != 0 -> Statement.status="error", Abbruch
   end
diff --git a/finance/app/static/szenarien.js b/finance/app/static/szenarien.js
index c5e0e67..ff022a2 100644
--- a/finance/app/static/szenarien.js
+++ b/finance/app/static/szenarien.js
@@ -40,7 +40,16 @@
     var form = select.closest('form');
     var art = select.value;
     var mitWert = Object.prototype.hasOwnProperty.call(WERT_LABEL, art);
-    sperren(feld(form, 'value'), !mitWert);
+    var wert = feld(form, 'value');
+    sperren(wert, !mitWert);
+    if (art === 'set') {
+      // Vorzeichenfalle: Ausgaben sind negativ (wie Fixposten-Beträge).
+      wert.placeholder = '-250,00';
+      wert.title = 'Neuer Betrag mit Vorzeichen (Ausgabe negativ)';
+      if (wert.value === '0') { wert.value = ''; }
+    } else {
+      wert.removeAttribute('placeholder');
+    }
     beschriften(form, 'value-label', mitWert ? WERT_LABEL[art] : 'Wert');
     sperren(feld(form, 'start_date'), art === 'ende');
     beschriften(form, 'bis-label', art === 'ende' ? 'Endet am' : 'Gültig bis');
diff --git a/finance/app/templates/planning.html b/finance/app/templates/planning.html
index b25bd50..4e60e96 100644
--- a/finance/app/templates/planning.html
+++ b/finance/app/templates/planning.html
@@ -221,7 +221,7 @@
             <label>Name <input type="text" name="name" value="{{ l.name }}" required></label>
             <label>Darlehenssumme <input type="text" name="principal" data-type="amount" value="{{ l.principal|eur }}" required></label>
             <label>Zins p.a. (%) <input type="text" name="annual_rate_pct" data-type="amount" value="{{ l.annual_rate_pct|eur }}" required></label>
-            <label>Laufzeit (Monate) <input type="number" name="term_months" data-type="int" min="1" value="{{ l.term_months }}" required></label>
+            <label>Laufzeit (Monate) <input type="number" name="term_months" data-type="int" min="1" max="1200" value="{{ l.term_months }}" required></label>
             <label>Auszahlungsdatum <input type="date" name="payout_date" value="{{ l.payout_date.isoformat() }}" required></label>
             <label>Tilgungsart
               <select name="repayment_type" data-type="str">
@@ -254,7 +254,7 @@
       <label>Name <input type="text" name="name" required></label>
       <label>Darlehenssumme <input type="text" name="principal" data-type="amount" placeholder="10000,00" required></label>
       <label>Zins p.a. (%) <input type="text" name="annual_rate_pct" data-type="amount" placeholder="4,5" required></label>
-      <label>Laufzeit (Monate) <input type="number" name="term_months" data-type="int" min="1" required></label>
+      <label>Laufzeit (Monate) <input type="number" name="term_months" data-type="int" min="1" max="1200" required></label>
       <label>Auszahlungsdatum <input type="date" name="payout_date" required></label>
       <label>Tilgungsart
         <select name="repayment_type" data-type="str">
diff --git a/finance/tests/js/szenarien.dom.test.js b/finance/tests/js/szenarien.dom.test.js
index 9d0b687..3f1c83e 100644
--- a/finance/tests/js/szenarien.dom.test.js
+++ b/finance/tests/js/szenarien.dom.test.js
@@ -75,6 +75,16 @@ test('Neuer Betrag: Ziel-Typ fest auf Posten, Kategorie gesperrt', { skip: !JSDO
   assert.equal(typ.querySelector('option[value="category"]').disabled, false);
 });
 
+test('Neuer Betrag: Vorzeichen-Hinweis als Platzhalter und Tooltip', { skip: !JSDOM }, () => {
+  const { w, a } = load();
+  art(w, a, 'set');
+  assert.equal(f(a, 'value').placeholder, '-250,00');
+  assert.ok(f(a, 'value').title.includes('Vorzeichen'));
+  art(w, a, 'percent');
+  assert.equal(f(a, 'value').placeholder, '');
+  assert.equal(f(a, 'value').hasAttribute('title'), false);
+});
+
 test('Ende: Gültig ab und Wert gesperrt, Label Endet am', { skip: !JSDOM }, () => {
   const { w, a } = load();
   art(w, a, 'ende');
diff --git a/finance/tests/test_gui.py b/finance/tests/test_gui.py
index 78cfc92..c45cb9a 100644
--- a/finance/tests/test_gui.py
+++ b/finance/tests/test_gui.py
@@ -705,3 +705,13 @@ def test_szenario_eintraege_zeitraum_und_wiederkehrend(client, db):
     assert f'hx-delete="/api/scenarios/{sc.id}/recurring/' in r
     assert "Kat-Anzeige" in r and "Zahlung-E" in r
     assert 'id="sri-row-' in r and 'id="sri-edit-' in r
+
+
+def test_planung_laufzeit_felder_haben_max_1200(client, db):
+    client.post("/login", data={"username": "admin", "password": "geheim"})
+    db.add(Loan(name="MaxL", principal=Decimal("1000.00"),
+                annual_rate_pct=Decimal("4.50"), term_months=12,
+                payout_date=date(2026, 8, 1), repayment_type="annuity"))
+    db.commit()
+    r = client.get("/planung").text
+    assert r.count('max="1200"') >= 2