diff --git a/BTCPayServer/Extensions/MoneyExtensions.cs b/BTCPayServer/Extensions/MoneyExtensions.cs
index a764774b3..cba8ea1c7 100644
--- a/BTCPayServer/Extensions/MoneyExtensions.cs
+++ b/BTCPayServer/Extensions/MoneyExtensions.cs
@@ -33,10 +33,12 @@ namespace BTCPayServer
 
         public static decimal Convert(long sats, int divisibility = 8)
         {
-            var amt = sats.ToString(CultureInfo.InvariantCulture).PadLeft(divisibility, '0');
+            var negative = sats < 0;
+            var amt = sats.ToString(CultureInfo.InvariantCulture)
+                .Replace("-", "")
+                .PadLeft(divisibility, '0');
             amt = amt.Length == divisibility ? $"0.{amt}" : amt.Insert(amt.Length - divisibility, ".");
-
-            return decimal.Parse(amt, CultureInfo.InvariantCulture);
+            return decimal.Parse($"{(negative? "-": string.Empty)}{amt}", CultureInfo.InvariantCulture);
         }
         public static string ShowMoney(this IMoney money, BTCPayNetwork network)
         {