diff --git a/Elwig/Documents/CreditNote.cs b/Elwig/Documents/CreditNote.cs
index 56adb30..52853a0 100644
--- a/Elwig/Documents/CreditNote.cs
+++ b/Elwig/Documents/CreditNote.cs
@@ -20,6 +20,7 @@ namespace Elwig.Documents {
         public decimal MemberTotalUnderDelivery;
         public int MemberAutoBusinessShares;
         public decimal MemberAutoBusinessSharesAmount;
+        public PaymentCustom? CustomPayment;
 
         public CreditNote(
             AppDbContext ctx,
@@ -28,6 +29,7 @@ namespace Elwig.Documents {
             bool considerContractPenalties,
             bool considerTotalPenalty,
             bool considerAutoBusinessShares,
+            bool considerCustomModifiers,
             Dictionary<string, UnderDelivery>? underDeliveries = null
         ) :
             base($"{Name} {(p.Credit != null ? $"Nr. {p.Credit.Year}/{p.Credit.TgNr:000}" : p.Member.Name)} – {p.Variant.Name}", p.Member) {
@@ -85,5 +87,8 @@ namespace Elwig.Documents {
                     .Where(u => u.Item3 != 0)
                     .ToList();
             }
+            if (considerCustomModifiers) {
+                CustomPayment = ctx.CustomPayments.Find(p.Year, p.MgNr);
+            }
         }
     }}
diff --git a/Elwig/Documents/CreditNote.cshtml b/Elwig/Documents/CreditNote.cshtml
index 0a16de9..3dede94 100644
--- a/Elwig/Documents/CreditNote.cshtml
+++ b/Elwig/Documents/CreditNote.cshtml
@@ -157,13 +157,17 @@
                 @Raw(FormatRow($"Autom. Nachz. von GA ({Model.MemberAutoBusinessShares})", Model.MemberAutoBusinessSharesAmount, add: true));
                 penalty += Model.MemberAutoBusinessSharesAmount;
             }
+            @if (Model.CustomPayment != null) {
+                @Raw(FormatRow(Model.CustomPayment.Comment ?? (Model.CustomPayment.Amount < 0 ? "Weitere Abzüge" : "Weitere Zuschläge"), Model.CustomPayment.Amount, add: true));
+                penalty += Model.CustomPayment.Amount;
+            }
 
             @if (Model.Credit == null) {
                 @Raw(FormatRow("Auszahlungsbetrag", (Model.Payment?.Amount + penalty) ?? (sum + penalty), bold: true))
             } else {
                 var diff = Model.Credit.Modifiers - penalty;
                 if (diff != 0) {
-                    @Raw(FormatRow(diff < 0 ? "Weitere Abzüge" : "Weitere Zuschläge", diff, add: true))
+                    @Raw(FormatRow(diff < 0 ? "Sonstige Abzüge" : "Sonstige Zuschläge", diff, add: true))
                 }
                 if (Model.Credit.PrevModifiers != null && Model.Credit.PrevModifiers != 0) {
                     @Raw(FormatRow("Bereits berücksichtigte Abzüge", -Model.Credit.PrevModifiers, add: true))
diff --git a/Elwig/Helpers/AppDbContext.cs b/Elwig/Helpers/AppDbContext.cs
index 8ccb3f5..41627b1 100644
--- a/Elwig/Helpers/AppDbContext.cs
+++ b/Elwig/Helpers/AppDbContext.cs
@@ -57,6 +57,7 @@ namespace Elwig.Helpers {
         public DbSet<PaymentVar> PaymentVariants { get; private set; }
         public DbSet<PaymentMember> MemberPayments { get; private set; }
         public DbSet<PaymentDeliveryPart> PaymentDeliveryParts { get; private set; }
+        public DbSet<PaymentCustom> CustomPayments { get; private set; }
         public DbSet<Credit> Credits { get; private set; }
 
         public DbSet<OverUnderDeliveryRow> OverUnderDeliveryRows { get; private set; }
diff --git a/Elwig/Helpers/AppDbUpdater.cs b/Elwig/Helpers/AppDbUpdater.cs
index 110a605..dd7a737 100644
--- a/Elwig/Helpers/AppDbUpdater.cs
+++ b/Elwig/Helpers/AppDbUpdater.cs
@@ -9,7 +9,7 @@ namespace Elwig.Helpers {
     public static class AppDbUpdater {
 
         // Don't forget to update value in Tests/fetch-resources.bat!
-        public static readonly int RequiredSchemaVersion = 21;
+        public static readonly int RequiredSchemaVersion = 22;
 
         private static int VersionOffset = 0;
 
diff --git a/Elwig/Helpers/Billing/BillingVariant.cs b/Elwig/Helpers/Billing/BillingVariant.cs
index 6c42156..3b41ef3 100644
--- a/Elwig/Helpers/Billing/BillingVariant.cs
+++ b/Elwig/Helpers/Billing/BillingVariant.cs
@@ -46,8 +46,10 @@ namespace Elwig.Helpers.Billing {
                            ROUND(p.amount / POW(10, s.precision - 2)) AS net_amount,
                            ROUND(lp.amount / POW(10, s.precision - 2)) AS prev_amount,
                            IIF(m.buchführend, s.vat_normal, s.vat_flatrate) AS vat,
+                           ROUND(IIF({Data.ConsiderTotalPenalty}, COALESCE(b.total_penalty, 0), 0) / POW(10, s.precision - 2)) +
                            ROUND(IIF({Data.ConsiderContractPenalties}, COALESCE(u.total_penalty, 0), 0) / POW(10, 4 - 2)) +
-                           ROUND(IIF({Data.ConsiderAutoBusinessShares}, -COALESCE(a.total_amount, 0), 0) / POW(10, s.precision - 2))
+                           ROUND(IIF({Data.ConsiderAutoBusinessShares}, -COALESCE(a.total_amount, 0), 0) / POW(10, s.precision - 2)) +
+                           IIF({Data.ConsiderCustomModifiers}, COALESCE(x.amount, 0), 0)
                            AS modifiers,
                            lc.modifiers AS prev_modifiers
                     FROM season s
@@ -64,28 +66,12 @@ namespace Elwig.Helpers.Billing {
                         LEFT JOIN payment_member lp ON (lp.year, lp.avnr, lp.mgnr) = (l.year, l.avnr, m.mgnr)
                         LEFT JOIN payment_member p ON (p.year, p.avnr, p.mgnr) = (v.year, v.avnr, m.mgnr)
                         LEFT JOIN credit lc ON (lc.year, lc.avnr, lc.mgnr) = (l.year, l.avnr, m.mgnr)
+                        LEFT JOIN v_penalty_business_shares b ON (b.year, b.mgnr) = (s.year, m.mgnr)
                         LEFT JOIN v_penalty_area_commitments u ON (u.year, u.mgnr) = (s.year, m.mgnr)
                         LEFT JOIN v_auto_business_shares a ON (a.year, a.mgnr) = (s.year, m.mgnr)
+                        LEFT JOIN payment_custom x ON (x.year, x.mgnr) = (s.year, m.mgnr)
                     WHERE s.year = {Year} AND v.avnr = {AvNr};
                     """);
-            if (Data.ConsiderTotalPenalty) {
-                if (App.Client.IsWinzerkeller) {
-                    // TODO
-                } else {
-                    await AppDbContext.ExecuteBatch(cnx, $"""
-                        UPDATE credit AS c
-                        SET modifiers = modifiers + ROUND((
-                              COALESCE(-s.penalty_amount, 0) +
-                              COALESCE(-s.penalty_per_bs_amount * CEIL(CAST(-u.diff AS REAL) / s.min_kg_per_bs), 0) +
-                              COALESCE(u.diff * s.penalty_per_kg, 0)
-                            ) / POW(10, s.precision - 2))
-                        FROM v_total_under_delivery u
-                            JOIN season s ON s.year = u.year
-                        WHERE c.year = {Year} AND c.avnr = {AvNr} AND (u.year, u.mgnr) = (c.year, c.mgnr) AND
-                              u.diff < 0
-                        """);
-                }
-            }
             await AppDbContext.ExecuteBatch(cnx, $"""
                 UPDATE payment_variant SET test_variant = FALSE WHERE (year, avnr) = ({Year}, {AvNr});
                 """);
diff --git a/Elwig/Models/Entities/PaymentCustom.cs b/Elwig/Models/Entities/PaymentCustom.cs
new file mode 100644
index 0000000..576b774
--- /dev/null
+++ b/Elwig/Models/Entities/PaymentCustom.cs
@@ -0,0 +1,31 @@
+using Elwig.Helpers;
+using Microsoft.EntityFrameworkCore;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Elwig.Models.Entities {
+    [Table("payment_custom"), PrimaryKey("Year", "MgNr")]
+    public class PaymentCustom {
+        [Column("year")]
+        public int Year { get; set; }
+
+        [Column("mgnr")]
+        public int MgNr { get; set; }
+
+        [Column("amount")]
+        public long AmountValue { get; set; }
+        [NotMapped]
+        public decimal Amount {
+            get => Utils.DecFromDb(AmountValue, 2);
+            set => AmountValue = Utils.DecToDb(value, 2);
+        }
+
+        [Column("comment")]
+        public string? Comment { get; set; }
+
+        [ForeignKey("Year")]
+        public virtual Season Season { get; private set; } = null!;
+
+        [ForeignKey("MgNr")]
+        public virtual Member Member { get; private set; } = null!;
+    }
+}
diff --git a/Elwig/Resources/Sql/21-22.sql b/Elwig/Resources/Sql/21-22.sql
new file mode 100644
index 0000000..1a86728
--- /dev/null
+++ b/Elwig/Resources/Sql/21-22.sql
@@ -0,0 +1,45 @@
+-- schema version 20 to 21
+
+CREATE VIEW v_penalty_business_shares AS
+SELECT u.year, u.mgnr,
+       SUM(IIF(u.weight = 0, COALESCE(-s.penalty_none, 0) + COALESCE(-u.business_shares * s.penalty_per_bs_none, 0), 0) +
+           IIF(u.diff < 0, COALESCE(-s.penalty_amount, 0), 0) +
+           COALESCE(u.diff * s.penalty_per_kg, 0) + COALESCE(CEIL(CAST(u.diff AS REAL) / s.min_kg_per_bs) * s.penalty_per_bs_amount, 0)
+       ) AS total_penalty
+FROM v_total_under_delivery u
+    JOIN season s ON u.year = s.year
+    JOIN member m ON m.mgnr = u.mgnr
+WHERE m.active
+GROUP BY u.year, u.mgnr
+HAVING total_penalty < 0
+ORDER BY u.year, u.mgnr;
+
+DROP VIEW v_penalty_area_commitments;
+CREATE VIEW v_penalty_area_commitments AS
+SELECT u.year, u.mgnr,
+       SUM(COALESCE(IIF(u.weight = 0, -t.penalty_none, 0), 0) +
+           COALESCE(IIF(u.diff < 0, -t.penalty_amount, 0), 0) +
+           COALESCE(u.diff * t.penalty_per_kg, 0)
+       ) AS total_penalty
+FROM v_under_delivery u
+   JOIN area_commitment_type t ON t.vtrgid = u.bucket
+GROUP BY year, mgnr
+HAVING total_penalty < 0
+ORDER BY year, mgnr;
+
+-- all values in the table are stored with precision 2!
+CREATE TABLE payment_custom (
+    year    INTEGER NOT NULL,
+    mgnr    INTEGER NOT NULL,
+
+    amount  INTEGER NOT NULL,
+    comment TEXT,
+
+    CONSTRAINT pk_payment_custom PRIMARY KEY (year, mgnr),
+    CONSTRAINT fk_payment_custom_season FOREIGN KEY (year) REFERENCES season (year)
+        ON UPDATE CASCADE
+        ON DELETE CASCADE,
+    CONSTRAINT fk_payment_custom_member FOREIGN KEY (mgnr) REFERENCES member (mgnr)
+        ON UPDATE CASCADE
+        ON DELETE CASCADE
+) STRICT;
diff --git a/Elwig/Windows/MailWindow.xaml.cs b/Elwig/Windows/MailWindow.xaml.cs
index c04c4e8..1c9e42c 100644
--- a/Elwig/Windows/MailWindow.xaml.cs
+++ b/Elwig/Windows/MailWindow.xaml.cs
@@ -535,6 +535,7 @@ namespace Elwig.Windows {
                                     data.Item3.ConsiderContractPenalties,
                                     data.Item3.ConsiderTotalPenalty,
                                     data.Item3.ConsiderAutoBusinessShares,
+                                    data.Item3.ConsiderCustomModifiers,
                                     ctx.GetMemberUnderDelivery(year, m.MgNr).GetAwaiter().GetResult()
                                 ) { Date = postalDate })];
                             } catch (Exception) {
diff --git a/Elwig/Windows/PaymentAdjustmentWindow.xaml b/Elwig/Windows/PaymentAdjustmentWindow.xaml
index 3a691a0..d4641a4 100644
--- a/Elwig/Windows/PaymentAdjustmentWindow.xaml
+++ b/Elwig/Windows/PaymentAdjustmentWindow.xaml
@@ -56,7 +56,8 @@
 
         <Grid Grid.Row="1">
             <DataGrid x:Name="MemberList" AutoGenerateColumns="False" HeadersVisibility="Column" IsReadOnly="True" GridLinesVisibility="None" SelectionMode="Single"
-                      CanUserDeleteRows="False" CanUserResizeRows="False" CanUserAddRows="False" Margin="10,10,5,10">
+                      CanUserDeleteRows="False" CanUserResizeRows="False" CanUserAddRows="False" Margin="10,10,5,10"
+                      SelectionChanged="MemberList_SelectionChanged">
                 <DataGrid.Resources>
                     <Style TargetType="{x:Type DataGridRow}">
                         <Style.Setters>
@@ -117,6 +118,13 @@
                             </Style>
                         </DataGridTextColumn.CellStyle>
                     </DataGridTextColumn>
+                    <DataGridTextColumn Header="Sonst." Binding="{Binding Custom, Converter={StaticResource CurrencyConverter}, StringFormat='{}{0} '}" Width="65">
+                        <DataGridTextColumn.CellStyle>
+                            <Style>
+                                <Setter Property="TextBlock.TextAlignment" Value="Right"/>
+                            </Style>
+                        </DataGridTextColumn.CellStyle>
+                    </DataGridTextColumn>
                     <DataGridTextColumn Header="Gesamt" Binding="{Binding Total, Converter={StaticResource CurrencyConverter}, StringFormat='{}{0} '}" Width="65">
                         <DataGridTextColumn.CellStyle>
                             <Style>
@@ -165,6 +173,36 @@
                             Click="UnAdjustBsButton_Click" Grid.Column="1"/>
                 </Grid>
             </GroupBox>
+
+            <GroupBox Header="Benutzerdefinierte Zu-/Abschläge" Margin="5,10,10,10" Height="180" Width="360"
+                      VerticalAlignment="Bottom" HorizontalAlignment="Left">
+                <Grid>
+                    <Label Content="Mitglied:" Margin="10,10,10,10"/>
+                    <TextBox x:Name="MgNrInput" Width="48" Margin="70,10,10,10" HorizontalAlignment="Left" TextAlignment="Right"
+                             TextChanged="MgNrInput_TextChanged" LostFocus="MgNrInput_LostFocus"/>
+                    <ComboBox x:Name="MemberInput" Margin="123,10,40,10" IsEditable="True"
+                              ItemTemplate="{StaticResource MemberAdminNameTemplate}" TextSearch.TextPath="AdministrativeName"
+                              SelectionChanged="MemberInput_SelectionChanged"
+                              VerticalAlignment="Top" Height="25" FontSize="14"/>
+                    <Button x:Name="MemberReferenceButton" Grid.Column="1" Height="25" Width="25" FontFamily="Segoe MDL2 Assets" Content="&#xEE35;" Padding="0,0,0,0"
+                            Margin="10,10,10,10" VerticalAlignment="Top" HorizontalAlignment="Right" ToolTip="Zu Mitglied springen"
+                            Click="MemberReferenceButton_Click"/>
+
+                    <Label Content="Betrag:" Margin="10,40,10,10"/>
+                    <ctrl:UnitTextBox x:Name="CustomAmountInput" Width="80" Margin="70,40,10,10" Unit="€"
+                                      TextChanged="CustomAmountInput_TextChanged"/>
+
+                    <Label Content="Freitext:" Margin="10,70,10,10"/>
+                    <TextBox x:Name="CustomCommentInput" Margin="70,70,10,10"/>
+
+                    <Button x:Name="SaveCustomButton" Content="Speichern" Margin="0,0,125,10" Width="120"
+                            HorizontalAlignment="Center" VerticalAlignment="Bottom"
+                            Click="CustomButton_Click"/>
+                    <Button x:Name="RemoveCustomButton" Content="Entfernen" Margin="125,0,0,10" Width="120"
+                            HorizontalAlignment="Center" VerticalAlignment="Bottom"
+                            Click="CustomButton_Click"/>
+                </Grid>
+            </GroupBox>
         </Grid>
 
         <StatusBar Grid.Row="2" Grid.ColumnSpan="3" BorderThickness="0,1,0,0" BorderBrush="Gray">
diff --git a/Elwig/Windows/PaymentAdjustmentWindow.xaml.cs b/Elwig/Windows/PaymentAdjustmentWindow.xaml.cs
index 9d38d1d..46234a1 100644
--- a/Elwig/Windows/PaymentAdjustmentWindow.xaml.cs
+++ b/Elwig/Windows/PaymentAdjustmentWindow.xaml.cs
@@ -1,6 +1,7 @@
 using Elwig.Helpers;
 using Elwig.Helpers.Billing;
 using Elwig.Models.Dtos;
+using Elwig.Models.Entities;
 using Microsoft.EntityFrameworkCore;
 using System;
 using System.Collections.Generic;
@@ -17,6 +18,8 @@ namespace Elwig.Windows {
         public readonly int Year;
         public readonly bool SeasonLocked;
 
+        public Dictionary<int, PaymentCustom>? CustomPayments;
+
         public PaymentAdjustmentWindow(int year) {
             InitializeComponent();
             Year = year;
@@ -26,6 +29,10 @@ namespace Elwig.Windows {
             Title = $"Auszahlung anpassen - Lese {Year} - Elwig";
             AutoAdjustBsButton.IsEnabled = !SeasonLocked;
             UnAdjustBsButton.IsEnabled = !SeasonLocked;
+            SaveCustomButton.IsEnabled = !SeasonLocked;
+            RemoveCustomButton.IsEnabled = !SeasonLocked;
+            CustomAmountInput.IsEnabled = !SeasonLocked;
+            CustomCommentInput.IsEnabled = !SeasonLocked;
 
             AllowanceKgInput.Text = $"{App.Client.AutoAdjustBs.AllowanceKg}";
             AllowanceBsInput.Text = $"{App.Client.AutoAdjustBs.AllowanceBs}";
@@ -54,6 +61,7 @@ namespace Elwig.Windows {
             var tbl2 = await AreaComUnderDeliveryData.ForSeason(ctx.AreaComUnderDeliveryRows, Year);
             var weight = tbl1.Rows.ToDictionary(r => r.MgNr, r => r.Weight);
             var areaComs = tbl2.Rows.ToDictionary(r => r.MgNr, r => r.VtrgIds.Zip(r.UnderDeliveries).ToDictionary(r => r.First, r => r.Second));
+            CustomPayments = await ctx.CustomPayments.Where(p => p.Year == Year).ToDictionaryAsync(p => p.MgNr, p => p);
 
             var history = await ctx.MemberHistory
                 .Where(h => h.DateString.CompareTo($"{Year}-01-01") >= 0 && h.DateString.CompareTo($"{Year}-12-31") <= 0 && h.Type == "auto" && h.BusinessShares > 0)
@@ -95,6 +103,7 @@ namespace Elwig.Windows {
                         }).Sum() : (decimal?)null,
                     m.Adjust,
                     m.AdjustAmount,
+                    Custom = CustomPayments!.GetValueOrDefault(m.MgNr, null)?.Amount,
                 })
                 .Select(m => new {
                     m.MgNr, m.FamilyName, m.GivenName,
@@ -103,22 +112,23 @@ namespace Elwig.Windows {
                     PenaltyAc = m.PenaltyAc == null ? (decimal?)null : Math.Round((decimal)m.PenaltyAc, 2),
                     m.Adjust,
                     AdjustAmount = m.AdjustAmount == null ? (decimal?)null : Math.Round((decimal)m.AdjustAmount, 2),
+                    m.Custom
                 })
                 .Select(m => new {
                     m.MgNr, m.FamilyName, m.GivenName,
                     m.BusinessShares, m.Weight, m.OverUnder,
-                    m.PenaltyBs, m.PenaltyAc, m.Adjust, m.AdjustAmount,
-                    Total = (m.PenaltyBs ?? 0) + (m.PenaltyAc ?? 0) + (m.AdjustAmount ?? 0),
+                    m.PenaltyBs, m.PenaltyAc, m.Adjust, m.AdjustAmount, m.Custom,
+                    Total = (m.PenaltyBs ?? 0) + (m.PenaltyAc ?? 0) + (m.AdjustAmount ?? 0) + (m.Custom ?? 0),
                 })
                 .Select(m => new {
                     m.MgNr, m.FamilyName, m.GivenName,
                     m.BusinessShares, m.Weight, m.OverUnder,
-                    m.PenaltyBs, m.PenaltyAc, m.Adjust, m.AdjustAmount,
+                    m.PenaltyBs, m.PenaltyAc, m.Adjust, m.AdjustAmount, m.Custom,
                     m.Total,
                     Background = m.Weight == 0 ? Brushes.Orange : m.Weight / 2 < -m.Total ? Brushes.Red : Brushes.White,
                     Foreground = m.Total == 0 ? Brushes.Gray : Brushes.Black,
                 })
-                .Where(m => m.OverUnder != null || m.Adjust != null || m.PenaltyBs != null || m.PenaltyAc != null)
+                .Where(m => m.OverUnder != null || m.Adjust != null || m.PenaltyBs != null || m.PenaltyAc != null || m.Custom != null)
                 .OrderByDescending(m => m.OverUnder ?? 0)
                 .ThenBy(m => m.FamilyName)
                 .ThenBy(m => m.GivenName)
@@ -131,8 +141,16 @@ namespace Elwig.Windows {
             PenaltyBusinessShares.Text = $"{list.Count(r => r.PenaltyBs != null && r.PenaltyBs != 0)} Mg. / {list.Sum(r => r.PenaltyBs):N2} {sym}";
             PenaltyAreaCommitments.Text = $"{list.Count(r => r.PenaltyAc != null && r.PenaltyAc != 0)} Mg. / {list.Sum(r => r.PenaltyAc):N2} {sym}";
             AutoBusinessShareAdjustment.Text = $"{list.Count(r => r.Adjust > 0)} Mg. / {list.Sum(r => r.Adjust)} GA / {list.Sum(r => r.AdjustAmount):N2} {sym}";
+            CustomModifiers.Text = $"{list.Count(r => r.Custom != null)} Mg. / {list.Sum(r => r.Custom):N2} {sym}";
             TotalModifiers.Text = $"{list.Count(r => r.Total != 0)} Mg. / {list.Sum(r => r.Total):N2} {sym}";
             NonDeliveries.Text = $"{list.Count(r => r.Weight == 0):N0}";
+
+            ControlUtils.RenewItemsSource(MemberInput, await ctx.Members
+                .OrderBy(m => m.FamilyName)
+                .ThenBy(m => m.GivenName)
+                .ThenBy(m => m.MgNr)
+                .ToListAsync());
+            CustomAmountInput.Unit = sym;
         }
 
         private async void AutoAdjustBsButton_Click(object sender, RoutedEventArgs evt) {
@@ -191,5 +209,82 @@ namespace Elwig.Windows {
         private void PercentInput_TextChanged(object sender, TextChangedEventArgs evt) {
             Validator.CheckDecimal((TextBox)sender, false, 3, 2);
         }
+
+        private void MemberList_SelectionChanged(object sender, SelectionChangedEventArgs evt) {
+            if (MemberList.SelectedItem != null) {
+                var i = MemberList.SelectedItem;
+                var t = i.GetType();
+                MgNrInput.Text = t.GetProperty("MgNr")?.GetValue(i)?.ToString();
+            }
+        }
+
+        private void MgNrInput_TextChanged(object sender, TextChangedEventArgs evt) {
+            var res = Validator.CheckMgNr((TextBox)sender, true);
+            ControlUtils.SelectItemWithPk(MemberInput, res.IsValid ? int.Parse(MgNrInput.Text) : null);
+        }
+
+        private void MgNrInput_LostFocus(object sender, RoutedEventArgs evt) {
+            var res = Validator.CheckMgNr((TextBox)sender, true);
+            ControlUtils.SelectItemWithPk(MemberInput, res.IsValid ? int.Parse(MgNrInput.Text) : null);
+        }
+
+        private void MemberInput_SelectionChanged(object sender, SelectionChangedEventArgs evt) {
+            if (MemberInput.SelectedItem is Member m) {
+                MgNrInput.Text = m.MgNr.ToString();
+                MemberList.SelectedItem = MemberList.ItemsSource.Cast<object>().FirstOrDefault(i => {
+                    var t = i.GetType();
+                    return (int?)t.GetProperty("MgNr")?.GetValue(i) == m.MgNr;
+                });
+                if (MemberList.SelectedItem != null)
+                    MemberList.ScrollIntoView(MemberList.SelectedItem);
+
+                if (CustomPayments?.TryGetValue(m.MgNr, out var p) == true) {
+                    CustomAmountInput.Text = $"{p.Amount:N2}";
+                    CustomCommentInput.Text = p.Comment ?? "";
+                } else {
+                    CustomAmountInput.Text = "";
+                    CustomCommentInput.Text = "";
+                }
+            } else {
+                CustomAmountInput.Text = "";
+                CustomCommentInput.Text = "";
+            }
+        }
+
+        private void MemberReferenceButton_Click(object sender, RoutedEventArgs evt) {
+            if (MemberInput.SelectedItem is not Member m) return;
+            App.FocusMember(m.MgNr);
+        }
+
+        private void CustomAmountInput_TextChanged(object sender, TextChangedEventArgs evt) {
+            Validator.CheckDecimal((TextBox)sender, false, 4, 2, true);
+        }
+
+        private async void CustomButton_Click(object sender, RoutedEventArgs evt) {
+            if (MemberInput.SelectedItem is not Member m) return;
+            Mouse.OverrideCursor = Cursors.AppStarting;
+            try {
+                using var ctx = new AppDbContext();
+                if (CustomPayments?.TryGetValue(m.MgNr, out var p) == true) {
+                    ctx.Remove(p);
+                }
+                if (sender == SaveCustomButton && decimal.TryParse(CustomAmountInput.Text, out var num)) {
+                    var text = CustomCommentInput.Text.Trim();
+                    ctx.Add(new PaymentCustom {
+                        MgNr = m.MgNr,
+                        Year = Year,
+                        Amount = num,
+                        Comment = text == "" ? null : text,
+                    });
+                }
+                await ctx.SaveChangesAsync();
+            } catch (Exception exc) {
+                var str = "Der Eintrag konnte nicht in der Datenbank aktualisiert werden!\n\n" + exc.Message;
+                if (exc.InnerException != null) str += "\n\n" + exc.InnerException.Message;
+                MessageBox.Show(str, "Benutzerdefinierten Zu-/Abschlag speichern", MessageBoxButton.OK, MessageBoxImage.Error);
+            }
+            await App.HintContextChange();
+            Mouse.OverrideCursor = null;
+        }
     }
 }
diff --git a/Tests/DocumentTests/CreditNoteTest.cs b/Tests/DocumentTests/CreditNoteTest.cs
index e23cbcc..ae39ed1 100644
--- a/Tests/DocumentTests/CreditNoteTest.cs
+++ b/Tests/DocumentTests/CreditNoteTest.cs
@@ -13,7 +13,7 @@ namespace Tests.DocumentTests {
             var m = await ctx.Members.FindAsync(101);
             var p = await ctx.MemberPayments.Where(p => p.Year == 2020 && p.AvNr == 1).SingleAsync();
             var data = await CreditNoteDeliveryData.ForPaymentVariant(ctx.CreditNoteDeliveryRows, ctx.Seasons, 2020, 1);
-            using var doc = new CreditNote(ctx, p, data[m!.MgNr], false, false, false,
+            using var doc = new CreditNote(ctx, p, data[m!.MgNr], false, false, false, false,
                 ctx.GetMemberUnderDelivery(2020, m!.MgNr).GetAwaiter().GetResult());
             var text = await Utils.GeneratePdfText(doc);
             Assert.Multiple(() => {
diff --git a/Tests/fetch-resources.bat b/Tests/fetch-resources.bat
index 13f8221..eb7707e 100644
--- a/Tests/fetch-resources.bat
+++ b/Tests/fetch-resources.bat
@@ -1 +1 @@
-curl --fail -s -L "https://elwig.at/files/create.sql?v=21" -u "elwig:ganzGeheim123!" -o "Resources\Sql\Create.sql"
+curl --fail -s -L "https://elwig.at/files/create.sql?v=22" -u "elwig:ganzGeheim123!" -o "Resources\Sql\Create.sql"