diff --git a/moneymgr_web/src/dialogs/AttachInboxEntryToMovementDialog.tsx b/moneymgr_web/src/dialogs/AttachInboxEntryToMovementDialog.tsx
new file mode 100644
index 0000000..e987c17
--- /dev/null
+++ b/moneymgr_web/src/dialogs/AttachInboxEntryToMovementDialog.tsx
@@ -0,0 +1,108 @@
+import CloseIcon from "@mui/icons-material/Close";
+import {
+  Alert,
+  AppBar,
+  Button,
+  Dialog,
+  Grid,
+  IconButton,
+  Toolbar,
+  Typography,
+} from "@mui/material";
+import React from "react";
+import { InboxEntry } from "../api/InboxApi";
+import { Movement } from "../api/MovementsApi";
+import { AsyncFileViewerWidget } from "../widgets/FileViewerWidget";
+import { SelectMovementWidget } from "../widgets/SelectMovementWidget";
+import { AmountWidget } from "../widgets/AmountWidget";
+import { fmtDateFromTime } from "../utils/DateUtils";
+
+export function AttachInboxEntryToMovementDialog(p: {
+  open: boolean;
+  entry: InboxEntry;
+  onSelected: (m: Movement) => void;
+  onClose: () => void;
+}): React.ReactElement {
+  const [value, setValue] = React.useState<undefined | Movement>();
+
+  const handleSubmit = () => {
+    if (!value) return;
+    p.onSelected(value);
+  };
+
+  return (
+    <Dialog fullScreen open={true} onClose={p.onClose}>
+      <AppBar sx={{ position: "relative" }}>
+        <Toolbar>
+          <IconButton
+            edge="start"
+            color="inherit"
+            onClick={p.onClose}
+            aria-label="close"
+          >
+            <CloseIcon />
+          </IconButton>
+          <Typography sx={{ ml: 2, flex: 1 }} variant="h6" component="div">
+            Attach inbox entry to movement
+          </Typography>
+          <Typography
+            sx={{ ml: 2, flex: 1 }}
+            style={{ display: "flex", flexDirection: "column" }}
+          >
+            <span>
+              {p.entry.amount !== undefined && (
+                <>
+                  <span>
+                    Amount: <AmountWidget amount={p.entry.amount} />
+                  </span>
+                </>
+              )}
+            </span>
+            <span>{p.entry.label && <>Label: {p.entry.label}</>}</span>
+            <span>
+              {p.entry.time && <>Date: {fmtDateFromTime(p.entry.time)}</>}
+            </span>
+          </Typography>
+          {Number.isFinite(p.entry.amount) &&
+            value !== undefined &&
+            p.entry.amount !== value?.amount && (
+              <Alert severity="warning">Amount mismatch!</Alert>
+            )}
+          <Button
+            autoFocus
+            color="inherit"
+            onClick={handleSubmit}
+            disabled={!value}
+          >
+            Attach
+          </Button>
+        </Toolbar>
+      </AppBar>
+      <Grid container style={{ flex: 1 }}>
+        <Grid
+          size={{ sm: 12, md: 6 }}
+          style={{
+            display: "flex",
+            height: "100%",
+          }}
+        >
+          <AsyncFileViewerWidget fileID={p.entry.file_id} />
+        </Grid>
+        <Grid
+          size={{ sm: 12, md: 6 }}
+          style={{ display: "flex", height: "100%" }}
+        >
+          <SelectMovementWidget
+            value={value?.id}
+            onChange={setValue}
+            initialValues={{
+              amount: p.entry.amount,
+              time: p.entry.time,
+              label: p.entry.label,
+            }}
+          />
+        </Grid>
+      </Grid>
+    </Dialog>
+  );
+}
diff --git a/moneymgr_web/src/dialogs/FileViewerDialog.tsx b/moneymgr_web/src/dialogs/FileViewerDialog.tsx
index 783aded..af01fd7 100644
--- a/moneymgr_web/src/dialogs/FileViewerDialog.tsx
+++ b/moneymgr_web/src/dialogs/FileViewerDialog.tsx
@@ -1,18 +1,17 @@
 import CloseIcon from "@mui/icons-material/Close";
-import CloudDownloadIcon from "@mui/icons-material/CloudDownload";
 import DownloadIcon from "@mui/icons-material/Download";
 import {
   AppBar,
   Button,
   Dialog,
   IconButton,
-  Paper,
   Toolbar,
   Typography,
 } from "@mui/material";
 import { filesize } from "filesize";
 import React from "react";
 import { FileApi, UploadedFile } from "../api/FileApi";
+import { FileViewerWidget } from "../widgets/FileViewerWidget";
 
 export function FileViewerDialog(p: {
   open: boolean;
@@ -51,65 +50,7 @@ export function FileViewerDialog(p: {
           </a>
         </Toolbar>
       </AppBar>
-      <FileViewer
-        url={FileApi.DownloadURL(p.file)}
-        downloadUrl={FileApi.DownloadURL(p.file, true)}
-        {...p.file}
-      />
+      <FileViewerWidget file={p.file} />
     </Dialog>
   );
 }
-
-type ViewerProps = {
-  url: string;
-  downloadUrl: string;
-} & UploadedFile;
-
-function FileViewer(p: ViewerProps): React.ReactElement {
-  // Image
-  if (p.mime_type.startsWith("image/")) return <ImageViewer {...p} />;
-  // PDF
-  else if (p.mime_type === "application/pdf") return <PDFViewer {...p} />;
-  // Default viewer
-  else return <DefaultViewer {...p} />;
-}
-
-function ImageViewer(p: ViewerProps): React.ReactElement {
-  return (
-    <img
-      src={p.url}
-      style={{ maxWidth: "100%", width: "fit-content", margin: "auto" }}
-    />
-  );
-}
-
-function PDFViewer(p: ViewerProps): React.ReactElement {
-  // eslint-disable-next-line react-dom/no-missing-iframe-sandbox
-  return <iframe style={{ flex: 1 }} src={p.url} />;
-}
-
-function DefaultViewer(p: ViewerProps): React.ReactElement {
-  return (
-    <Paper
-      elevation={3}
-      style={{
-        margin: "10px",
-        padding: "10px",
-        display: "flex",
-        flexDirection: "column",
-        justifyContent: "center",
-        alignItems: "center",
-      }}
-    >
-      <Typography variant="h5" gutterBottom>
-        <CloudDownloadIcon fontSize="large" />
-      </Typography>
-      <Typography variant="caption" gutterBottom>
-        {filesize(p.file_size)}
-      </Typography>
-      <a href={p.downloadUrl} target="_blank" referrerPolicy="no-referrer">
-        <Button variant="outlined">Download</Button>
-      </a>
-    </Paper>
-  );
-}
diff --git a/moneymgr_web/src/routes/InboxRoute.tsx b/moneymgr_web/src/routes/InboxRoute.tsx
index d4eb184..495c815 100644
--- a/moneymgr_web/src/routes/InboxRoute.tsx
+++ b/moneymgr_web/src/routes/InboxRoute.tsx
@@ -2,6 +2,7 @@ import DeleteIcon from "@mui/icons-material/DeleteOutlined";
 import LinkOffIcon from "@mui/icons-material/LinkOff";
 import MoreVertIcon from "@mui/icons-material/MoreVert";
 import RefreshIcon from "@mui/icons-material/Refresh";
+import SearchIcon from "@mui/icons-material/Search";
 import {
   Checkbox,
   FormControlLabel,
@@ -13,9 +14,16 @@ import {
   TextField,
   Tooltip,
 } from "@mui/material";
-import { DataGrid, GridColDef, GridRowSelectionModel } from "@mui/x-data-grid";
+import {
+  DataGrid,
+  GridActionsCellItem,
+  GridColDef,
+  GridRowSelectionModel,
+} from "@mui/x-data-grid";
 import React from "react";
 import { InboxApi, InboxEntry } from "../api/InboxApi";
+import { Movement, MovementApi } from "../api/MovementsApi";
+import { AttachInboxEntryToMovementDialog } from "../dialogs/AttachInboxEntryToMovementDialog";
 import { useAlert } from "../hooks/context_providers/AlertDialogProvider";
 import { useConfirm } from "../hooks/context_providers/ConfirmDialogProvider";
 import { useLoadingMessage } from "../hooks/context_providers/LoadingMessageProvider";
@@ -124,6 +132,51 @@ function InboxTable(p: {
   const [rowSelectionModel, setRowSelectionModel] =
     React.useState<GridRowSelectionModel>([]);
 
+  const [attaching, setAttaching] = React.useState<InboxEntry | undefined>();
+
+  // Request to attach entry to movement
+  const handleAttachClick = async (entry: InboxEntry) => {
+    setAttaching(entry);
+  };
+
+  const handleCloseAttachDialog = () => {
+    setAttaching(undefined);
+  };
+
+  // Finish attach entry to movement
+  const performAttach = async (movement: Movement) => {
+    try {
+      loadingMessage.show("Attaching inbox entry to movement...");
+
+      await Promise.all([
+        // Update movement
+        MovementApi.Update({
+          ...movement,
+          file_id: attaching?.file_id,
+        }),
+
+        // Update inbox entries
+        InboxApi.Update({
+          ...attaching!,
+          movement_id: movement.id,
+        }),
+      ]);
+
+      snackbar(
+        "The inbox entry has been successfully attached to the movement!"
+      );
+
+      setAttaching(undefined);
+
+      p.onReload(false);
+    } catch (e) {
+      console.error("Failed to attach inbox entry to movement!", e);
+      alert(`Failed to attach inbox entry to movement! ${e}`);
+    } finally {
+      loadingMessage.hide();
+    }
+  };
+
   // Delete inbox entry
   const handleDeleteClick = async (entry: InboxEntry) => {
     try {
@@ -278,11 +331,18 @@ function InboxTable(p: {
       field: "actions",
       type: "actions",
       headerName: "",
-      width: 55,
+      width: 82,
       cellClassName: "actions",
       editable: false,
       getActions: (params) => {
         return [
+          <GridActionsCellItem
+            key={`del-${params.row.id}`}
+            icon={<SearchIcon />}
+            label="Attach entry to movement"
+            color="inherit"
+            onClick={() => handleAttachClick(params.row)}
+          />,
           <InboxEntryActionMenu
             key="menu"
             entry={params.row}
@@ -296,6 +356,15 @@ function InboxTable(p: {
 
   return (
     <>
+      {attaching && (
+        <AttachInboxEntryToMovementDialog
+          open
+          entry={attaching}
+          onSelected={performAttach}
+          onClose={handleCloseAttachDialog}
+        />
+      )}
+
       <div style={{ display: "flex" }}>
         <TextField
           placeholder="Filter by label"
diff --git a/moneymgr_web/src/widgets/FileViewerWidget.tsx b/moneymgr_web/src/widgets/FileViewerWidget.tsx
new file mode 100644
index 0000000..71f9d07
--- /dev/null
+++ b/moneymgr_web/src/widgets/FileViewerWidget.tsx
@@ -0,0 +1,91 @@
+import CloudDownloadIcon from "@mui/icons-material/CloudDownload";
+import { Button, Paper, Typography } from "@mui/material";
+import { filesize } from "filesize";
+import { FileApi, UploadedFile } from "../api/FileApi";
+import { AsyncWidget } from "./AsyncWidget";
+import React from "react";
+
+export function AsyncFileViewerWidget(p: {
+  fileID: number;
+}): React.ReactElement {
+  const [file, setFile] = React.useState<UploadedFile | undefined>();
+
+  const load = async () => {
+    setFile(await FileApi.GetFile(p.fileID));
+  };
+
+  return (
+    <AsyncWidget
+      loadKey={p.fileID}
+      load={load}
+      errMsg="Failed to load file information!"
+      build={() => <FileViewerWidget file={file!} />}
+    />
+  );
+}
+
+export function FileViewerWidget(p: {
+  file: UploadedFile;
+}): React.ReactElement {
+  return (
+    <FileViewer
+      url={FileApi.DownloadURL(p.file)}
+      downloadUrl={FileApi.DownloadURL(p.file, true)}
+      {...p.file}
+    />
+  );
+}
+
+type ViewerProps = {
+  url: string;
+  downloadUrl: string;
+} & UploadedFile;
+
+function FileViewer(p: ViewerProps): React.ReactElement {
+  // Image
+  if (p.mime_type.startsWith("image/")) return <ImageViewer {...p} />;
+  // PDF
+  else if (p.mime_type === "application/pdf") return <PDFViewer {...p} />;
+  // Default viewer
+  else return <DefaultViewer {...p} />;
+}
+
+function ImageViewer(p: ViewerProps): React.ReactElement {
+  return (
+    <img
+      src={p.url}
+      style={{ maxWidth: "100%", width: "fit-content", margin: "auto" }}
+    />
+  );
+}
+
+function PDFViewer(p: ViewerProps): React.ReactElement {
+  // eslint-disable-next-line react-dom/no-missing-iframe-sandbox
+  return <iframe style={{ flex: 1 }} src={p.url} />;
+}
+
+function DefaultViewer(p: ViewerProps): React.ReactElement {
+  return (
+    <Paper
+      elevation={3}
+      style={{
+        margin: "10px",
+        padding: "10px",
+        display: "flex",
+        flexDirection: "column",
+        justifyContent: "center",
+        alignItems: "center",
+      }}
+    >
+      <Typography variant="h5" gutterBottom>
+        <CloudDownloadIcon fontSize="large" />
+      </Typography>
+      <Typography variant="caption" gutterBottom>
+        {filesize(p.file_size)}
+      </Typography>
+      <a href={p.downloadUrl} target="_blank" referrerPolicy="no-referrer">
+        <Button variant="outlined">Download</Button>
+      </a>
+    </Paper>
+  );
+}
diff --git a/moneymgr_web/src/widgets/SelectMovementWidget.tsx b/moneymgr_web/src/widgets/SelectMovementWidget.tsx
index 95de589..fcd8fdf 100644
--- a/moneymgr_web/src/widgets/SelectMovementWidget.tsx
+++ b/moneymgr_web/src/widgets/SelectMovementWidget.tsx
@@ -1,20 +1,20 @@
 import { ListItem, ListItemButton, Paper, Typography } from "@mui/material";
 import React from "react";
+import { Movement, MovementApi } from "../api/MovementsApi";
+import { AsyncWidget } from "./AsyncWidget";
 import { AccountInput } from "./forms/AccountInput";
 import { AmountInput } from "./forms/AmountInput";
 import { DateInput } from "./forms/DateInput";
 import { TextInput } from "./forms/TextInput";
-import { Movement, MovementApi } from "../api/MovementsApi";
-import { AsyncWidget } from "./AsyncWidget";
-import { AsyncMovementWidget, MovementWidget } from "./MovementWidget";
+import { MovementWidget } from "./MovementWidget";
 
 export function SelectMovementWidget(p: {
   value?: number;
-  onChange: (movementId: number) => void;
+  onChange: (movement: Movement) => void;
   initialValues?: {
     amount?: number;
     accountId?: number;
-    date?: number;
+    time?: number;
     label?: string;
   };
 }): React.ReactElement {
@@ -24,8 +24,8 @@ export function SelectMovementWidget(p: {
   const [accountId, setAccountId] = React.useState<number | undefined>(
     p.initialValues?.accountId
   );
-  const [date, setDate] = React.useState<number | undefined>(
-    p.initialValues?.date
+  const [time, setTime] = React.useState<number | undefined>(
+    p.initialValues?.time
   );
   const [label, setLabel] = React.useState<string | undefined>(
     p.initialValues?.label
@@ -35,8 +35,8 @@ export function SelectMovementWidget(p: {
     label: label,
     amount_min: amount ? amount - 0.5 : undefined,
     amount_max: amount ? amount + 0.5 : undefined,
-    time_min: date ? date - 3600 * 24 : undefined,
-    time_max: date ? date + 3600 * 24 : undefined,
+    time_min: time ? time - 3600 * 24 : undefined,
+    time_max: time ? time + 3600 * 24 : undefined,
     limit: 10,
   };
 
@@ -49,7 +49,7 @@ export function SelectMovementWidget(p: {
   };
 
   return (
-    <Paper style={{ padding: "10px" }}>
+    <Paper style={{ padding: "10px", flex: 1 }}>
       <div
         style={{ display: "flex", flexDirection: "row", alignItems: "center" }}
       >
@@ -71,8 +71,8 @@ export function SelectMovementWidget(p: {
         <span style={{ flex: 1 }} />
         <DateInput
           editable
-          value={date}
-          onValueChange={setDate}
+          value={time}
+          onValueChange={setTime}
           label="Date"
           style={{ flex: 20 }}
           variant="outlined"
@@ -112,7 +112,7 @@ export function SelectMovementWidget(p: {
                 <ListItem>
                   <ListItemButton
                     selected={entry.id === p.value}
-                    onClick={() => p.onChange(entry.id)}
+                    onClick={() => p.onChange(entry)}
                   >
                     <MovementWidget movement={entry} />
                   </ListItemButton>