diff --git a/game.py b/game.py
index 56d8dac..2e71460 100644
--- a/game.py
+++ b/game.py
@@ -18,6 +18,7 @@ BASE_SLOTS = 12
 BASE_STACK = 1000
 CLASS_SPEED = 0.8
 LUCKY_CHANCE = 0.1
+OVERFLOW_FAVOUR = 0.5   # favour for items a full bank spills to the city, vs. giving on purpose
 RECON_PER_INTEL = 8
 MAX_LOG = 200
 REGEN_PER_HOUR = 0.25   # share of max HP recovered per game hour
@@ -452,7 +453,7 @@ def bank_add(world: dict, player: dict, item: str, qty: int, now: float, overflo
         stockpile = world["city"]["stockpile"]
         stockpile[item] = stockpile.get(item, 0) + spill
         gain = spill * ITEMS[item]["value"]
-        player["favour"] += gain
+        player["favour"] += gain * OVERFLOW_FAVOUR
         player["donated"] += gain
         overflow[item] = overflow.get(item, 0) + spill
     return keep
diff --git a/static/app.js b/static/app.js
index e7c6a71..614d01c 100644
--- a/static/app.js
+++ b/static/app.js
@@ -150,7 +150,7 @@ function awayModal(sum) {
     ${sum.gold ? `<p class="gold">+${fmt(sum.gold)} gold</p>` : ""}
     ${xp ? `<ul>${xp}</ul>` : ""}
     ${levels ? `<ul>${levels}</ul>` : ""}
-    ${spilled ? `<p class="muted small">Your bank was full, so this went to the city stockpile (you earned favour for it):</p><ul>${spilled}</ul>` : ""}
+    ${spilled ? `<p class="muted small">Your bank was full, so this went to the city stockpile (for half the favour of giving it yourself):</p><ul>${spilled}</ul>` : ""}
     ${sum.stopped ? `<p class="tag bad">Stopped: ${esc(sum.stopped)}</p>` : ""}
     <p><button class="btn primary" data-close>Back to work</button></p>`);
 }
@@ -421,7 +421,7 @@ function bank() {
           <p class="small muted">When an item doesn't fit:
             <button class="btn sm ${me.overflow === "city" ? "gold" : ""}" data-overflow="city">Send it to the city</button>
             <button class="btn sm ${me.overflow === "stop" ? "gold" : ""}" data-overflow="stop">Stop working</button>
-            <br>Raids never touch your bank. Overflow sent to the city still earns favour.</p>
+            <br>Raids never touch your bank. Overflow sent to the city earns half the favour of giving it yourself.</p>
         </div>
         ${favourPanel()}
       </div>
diff --git a/tests/test_game.py b/tests/test_game.py
index 4bddc9e..8717b34 100644
--- a/tests/test_game.py
+++ b/tests/test_game.py
@@ -106,7 +106,8 @@ class ActionTest(unittest.TestCase):
         self.assertEqual(p["bank"]["stone"], game.BASE_STACK)
         self.assertEqual(summary["overflow"], {"stone": 3})
         self.assertEqual(world["city"]["stockpile"]["stone"], 3)
-        self.assertEqual(p["favour"], 3)
+        self.assertEqual(p["favour"], 1.5)  # half favour for overflow
+        self.assertEqual(p["donated"], 3)
 
     def test_full_bank_can_stop_instead(self):
         world = world_with(("fred", "warrior"))