diff --git a/config.yml.example b/config.yml.example
index c4707f5..906d062 100644
--- a/config.yml.example
+++ b/config.yml.example
@@ -11,6 +11,8 @@ mirrors:
     svn:
       url: https://svn.example.com/svn/myproject
       layout: std              # "std" or "custom"
+      username:               # SVN login (omit if anonymous)
+      password:               # SVN password
       # For non-standard layout:
       # layout: custom
       # trunk: trunk
diff --git a/svn_mirror/config.py b/svn_mirror/config.py
index af087b5..b46d857 100644
--- a/svn_mirror/config.py
+++ b/svn_mirror/config.py
@@ -28,6 +28,14 @@ class SVNConfig:
     trunk: str = "trunk"
     branches: str = "branches"
     tags: str = "tags"
+    username: Optional[str] = None
+    password: Optional[str] = None
+
+    def auth_args(self) -> list:
+        """Return ``['--username', u, '--password', p]`` if configured, else []."""
+        if self.username:
+            return ["--username", self.username, "--password", self.password or ""]
+        return []
 
     @classmethod
     def from_dict(cls, d: dict, prefix: str) -> "SVNConfig":
@@ -47,7 +55,13 @@ class SVNConfig:
         for name, val in [("trunk", trunk), ("branches", branches), ("tags", tags)]:
             _check_type(val, str, f"{prefix}.{name}")
 
-        return cls(url=url, layout=layout, trunk=trunk, branches=branches, tags=tags)
+        username = d.get("username")
+        _check_optional(username, str, f"{prefix}.username")
+        password = d.get("password")
+        _check_optional(password, str, f"{prefix}.password")
+
+        return cls(url=url, layout=layout, trunk=trunk, branches=branches,
+                   tags=tags, username=username, password=password)
 
 
 @dataclass
diff --git a/svn_mirror/git_to_svn.py b/svn_mirror/git_to_svn.py
index 366a6e1..ce31155 100644
--- a/svn_mirror/git_to_svn.py
+++ b/svn_mirror/git_to_svn.py
@@ -91,8 +91,11 @@ def _wc_path(mirror: Mirror, svn_branch: str) -> Path:
 
 
 def _run_svn(args: list, input: bytes = None, timeout: int = 120,
-             wc: Optional[Path] = None):
+             wc: Optional[Path] = None,
+             auth_args: Optional[list] = None):
     """Run an svn command.  If *wc* is given, run from that directory."""
+    if auth_args:
+        args = auth_args + args
     env = {**os.environ, "LC_ALL": "C"}
     try:
         r = subprocess.run(
@@ -116,12 +119,14 @@ def _run_svn(args: list, input: bytes = None, timeout: int = 120,
 
 def _ensure_wc(mirror: Mirror, svn_branch: str):
     """Ensure the SVN working copy for *svn_branch* exists and is at HEAD."""
+    auth_args = mirror.config.svn.auth_args()
     wc = _wc_path(mirror, svn_branch)
     svn_url = mirror.config.svn.url.rstrip("/") + "/" + svn_branch
     if not (wc / ".svn").exists():
         logger.info("Checking out SVN WC for %s …", svn_branch)
         wc.mkdir(parents=True, exist_ok=True)
-        _run_svn(["checkout", svn_url, str(wc)], timeout=300)
+        _run_svn(["checkout", svn_url, str(wc)], timeout=300,
+                 auth_args=auth_args)
     else:
         logger.debug("Updating SVN WC for %s …", svn_branch)
         _run_svn(["revert", "-R", "."], timeout=120, wc=wc)
diff --git a/svn_mirror/mirror.py b/svn_mirror/mirror.py
index 185532b..c54691e 100644
--- a/svn_mirror/mirror.py
+++ b/svn_mirror/mirror.py
@@ -190,6 +190,9 @@ class Mirror:
             args.extend(["-b", svn_cfg.branches])
             args.extend(["-t", svn_cfg.tags])
 
+        if svn_cfg.username:
+            args.extend(["--username", svn_cfg.username])
+
         if self.config.authors:
             args.extend(["--authors-file", str(self.authors_path)])
 
diff --git a/svn_mirror/reconcile.py b/svn_mirror/reconcile.py
index da68453..5ec32bc 100644
--- a/svn_mirror/reconcile.py
+++ b/svn_mirror/reconcile.py
@@ -146,6 +146,7 @@ def assess(mirror: Mirror, ref: str = "refs/heads/master") -> Dict[str, Any]:
 
     Only analyses *ref* (default: refs/heads/master → SVN trunk).
     """
+    auth_args = mirror.config.svn.auth_args()
     git_dir = str(mirror.canonical_dir)
     db = mirror.db
     svn_url = mirror.config.svn.url
@@ -168,13 +169,14 @@ def assess(mirror: Mirror, ref: str = "refs/heads/master") -> Dict[str, Any]:
     # ── 2. SVN side ───────────────────────────────────────
     last_svn_rev_str = db.get_state("last_svn_revision")
     last_svn_rev = int(last_svn_rev_str) if last_svn_rev_str else 0
-    latest_svn_rev = svn_get_latest_revision(svn_url)
+    latest_svn_rev = svn_get_latest_revision(svn_url, auth_args=auth_args)
 
     pending_svn: List[Dict[str, Any]] = []
     svn_changed_files: Dict[str, List[int]] = {}
     if last_svn_rev < latest_svn_rev:
         try:
-            entries = svn_get_log_range(svn_url, last_svn_rev + 1, latest_svn_rev)
+            entries = svn_get_log_range(svn_url, last_svn_rev + 1, latest_svn_rev,
+                                        auth_args=auth_args)
         except Exception:
             entries = []
         for entry in entries:
diff --git a/svn_mirror/svn.py b/svn_mirror/svn.py
index ddbd2cb..87203e9 100644
--- a/svn_mirror/svn.py
+++ b/svn_mirror/svn.py
@@ -28,7 +28,10 @@ class SVNLogEntry:
     paths: List[SVNPathChange] = field(default_factory=list)
 
 
-def _run_svn(args: list, input: bytes = None, timeout: int = 120) -> subprocess.CompletedProcess:
+def _run_svn(args: list, input: bytes = None, timeout: int = 120,
+             auth_args: Optional[list] = None) -> subprocess.CompletedProcess:
+    if auth_args:
+        args = auth_args + args
     try:
         r = subprocess.run(
             ["svn"] + args,
@@ -48,9 +51,9 @@ def _run_svn(args: list, input: bytes = None, timeout: int = 120) -> subprocess.
     return r
 
 
-def get_latest_revision(url: str) -> int:
+def get_latest_revision(url: str, auth_args: Optional[list] = None) -> int:
     """Return the HEAD revision number of an SVN repository."""
-    r = _run_svn(["info", "--xml", url], timeout=60)
+    r = _run_svn(["info", "--xml", url], timeout=60, auth_args=auth_args)
     root = ET.fromstring(r.stdout)
     entry = root.find(".//entry")
     if entry is None:
@@ -61,11 +64,11 @@ def get_latest_revision(url: str) -> int:
     return int(rev)
 
 
-def get_log(url: str, revision: int) -> SVNLogEntry:
+def get_log(url: str, revision: int, auth_args: Optional[list] = None) -> SVNLogEntry:
     """Fetch log entry with changed paths for a single SVN revision."""
     r = _run_svn(
         ["log", "-r", str(revision), "--verbose", "--xml", url],
-        timeout=120,
+        timeout=120, auth_args=auth_args,
     )
     root = ET.fromstring(r.stdout)
     logentry = root.find("logentry")
@@ -108,14 +111,15 @@ def get_log(url: str, revision: int) -> SVNLogEntry:
     )
 
 
-def get_log_range(url: str, start_rev: int, end_rev: int) -> List[SVNLogEntry]:
+def get_log_range(url: str, start_rev: int, end_rev: int,
+                  auth_args: Optional[list] = None) -> List[SVNLogEntry]:
     """Fetch log entries for a range of SVN revisions in one call.
 
     Returns entries from *start_rev* to *end_rev* (inclusive), oldest first.
     """
     r = _run_svn(
         ["log", "-r", f"{start_rev}:{end_rev}", "--verbose", "--xml", url],
-        timeout=300,
+        timeout=300, auth_args=auth_args,
     )
     root = ET.fromstring(r.stdout)
     entries: List[SVNLogEntry] = []
@@ -163,11 +167,13 @@ def get_log_range(url: str, start_rev: int, end_rev: int) -> List[SVNLogEntry]:
     return entries
 
 
-def get_file(url: str, path: str, revision: int) -> bytes:
+def get_file(url: str, path: str, revision: int,
+             auth_args: Optional[list] = None) -> bytes:
     """Return the full content of a file at a given SVN revision.
 
     `path` is the absolute SVN path, e.g. /trunk/src/main.c.
     """
     full_url = url.rstrip("/") + path
-    r = _run_svn(["cat", "-r", str(revision), full_url], timeout=60)
+    r = _run_svn(["cat", "-r", str(revision), full_url], timeout=60,
+                 auth_args=auth_args)
     return r.stdout
diff --git a/svn_mirror/sync.py b/svn_mirror/sync.py
index c193199..87553e9 100644
--- a/svn_mirror/sync.py
+++ b/svn_mirror/sync.py
@@ -177,6 +177,7 @@ def _build_tree_from_changes(
     changes: List[Tuple],
     svn_url: str,
     revision: int,
+    auth_args: Optional[List[str]] = None,
 ) -> str:
     """Build a new Git tree by applying SVN changes to the parent tree.
 
@@ -202,7 +203,7 @@ def _build_tree_from_changes(
     # ── 2. Apply changes ──────────────────────────────────────
     for action, kind, rel_path, full_path, cf_path, cf_rev in changes:
         if action in ("A", "M") and kind == "file":
-            content = svn_get_file(svn_url, full_path, revision)
+            content = svn_get_file(svn_url, full_path, revision, auth_args=auth_args)
             blob_oid = _git_bytes(git_dir, "hash-object", "-w", "--stdin",
                                   input=content, timeout=60)
             entries[rel_path] = ("100644", blob_oid)
@@ -218,7 +219,7 @@ def _build_tree_from_changes(
 
         elif action == "R" and kind == "file":
             entries.pop(rel_path, None)
-            content = svn_get_file(svn_url, full_path, revision)
+            content = svn_get_file(svn_url, full_path, revision, auth_args=auth_args)
             blob_oid = _git_bytes(git_dir, "hash-object", "-w", "--stdin",
                                   input=content, timeout=60)
             entries[rel_path] = ("100644", blob_oid)
@@ -311,7 +312,8 @@ def _find_copy_source(cfg, db, changes) -> Optional[str]:
 # ─── Per-revision sync ────────────────────────────────────────
 
 
-def sync_svn_revision(mirror: Mirror, revision: int) -> bool:
+def sync_svn_revision(mirror: Mirror, revision: int,
+                      auth_args: Optional[List[str]] = None) -> bool:
     """Translate a single SVN revision into Git commit(s).
 
     Returns True if at least one Git commit was created.
@@ -320,7 +322,7 @@ def sync_svn_revision(mirror: Mirror, revision: int) -> bool:
     git_dir = str(mirror.canonical_dir)
 
     # Fetch SVN metadata
-    log_entry = svn_get_log(cfg.svn.url, revision)
+    log_entry = svn_get_log(cfg.svn.url, revision, auth_args=auth_args)
     branch_changes = group_changes_by_branch(log_entry.paths, cfg.svn)
 
     if not branch_changes:
@@ -348,6 +350,7 @@ def sync_svn_revision(mirror: Mirror, revision: int) -> bool:
         # Build new tree
         new_tree = _build_tree_from_changes(
             git_dir, parent_hash, changes, cfg.svn.url, revision,
+            auth_args=auth_args,
         )
 
         # Map author
@@ -423,10 +426,11 @@ def sync_all(mirror: Mirror) -> int:
 
 
 def _sync_all_impl(mirror: Mirror) -> int:
+    auth_args = mirror.config.svn.auth_args()
     state_rev = mirror.db.get_state("last_svn_revision")
     trunk_name = mirror.config.svn.trunk
     last_rev = int(state_rev) if state_rev else (mirror.db.get_last_svn_revision(trunk_name) or 0)
-    latest_rev = svn_get_latest_revision(mirror.config.svn.url)
+    latest_rev = svn_get_latest_revision(mirror.config.svn.url, auth_args=auth_args)
 
     if latest_rev <= last_rev:
         logger.debug("Mirror %s is up to date (r%d)", mirror.config.id, last_rev)
@@ -440,7 +444,7 @@ def _sync_all_impl(mirror: Mirror) -> int:
     count = 0
     for rev in range(last_rev + 1, latest_rev + 1):
         try:
-            if sync_svn_revision(mirror, rev):
+            if sync_svn_revision(mirror, rev, auth_args=auth_args):
                 count += 1
         except Exception:
             logger.exception("Failed to sync SVN r%d for %s", rev, mirror.config.id)