diff --git a/conservancy_beancount/plugin/core.py b/conservancy_beancount/plugin/core.py
index c7bb566..b407455 100644
--- a/conservancy_beancount/plugin/core.py
+++ b/conservancy_beancount/plugin/core.py
@@ -160,6 +160,13 @@ class _PostingHook(TransactionHook, metaclass=abc.ABCMeta):
     def __init_subclass__(cls) -> None:
         cls.HOOK_GROUPS = cls.HOOK_GROUPS.union(['posting'])
 
+    def _is_flagged_fixme(self, post: data.Posting, value: MetaValue) -> bool:
+        return (
+            post.meta.txn.flag == '!'
+            and isinstance(value, str)
+            and value.startswith('FIXME')
+        )
+
     def _run_on_post(self, txn: Transaction, post: data.Posting) -> bool:
         return True
 
@@ -205,9 +212,10 @@ class _NormalizePostingMetadataHook(_PostingHook):
             try:
                 set_value = self.VALUES_ENUM[source_value]
             except KeyError:
-                error = errormod.InvalidMetadataError(
-                    txn, self.METADATA_KEY, source_value, post,
-                )
+                if not self._is_flagged_fixme(post, source_value):
+                    error = errormod.InvalidMetadataError(
+                        txn, self.METADATA_KEY, source_value, post,
+                    )
         if error is None:
             post.meta[self.METADATA_KEY] = set_value
         else:
diff --git a/conservancy_beancount/plugin/meta_paypal_id.py b/conservancy_beancount/plugin/meta_paypal_id.py
index 209515f..dd11f39 100644
--- a/conservancy_beancount/plugin/meta_paypal_id.py
+++ b/conservancy_beancount/plugin/meta_paypal_id.py
@@ -39,5 +39,5 @@ class MetaPayPalID(core._PostingHook):
             match = regexp.match(value)  # type:ignore[arg-type]
         except TypeError:
             match = None
-        if match is None:
+        if match is None and not self._is_flagged_fixme(post, value):
             yield errormod.InvalidMetadataError(txn, self.METADATA_KEY, value, post)
diff --git a/conservancy_beancount/plugin/meta_tax_implication.py b/conservancy_beancount/plugin/meta_tax_implication.py
index a0e7b28..8a4a829 100644
--- a/conservancy_beancount/plugin/meta_tax_implication.py
+++ b/conservancy_beancount/plugin/meta_tax_implication.py
@@ -59,10 +59,6 @@ class MetaTaxImplication(core._NormalizePostingMetadataHook):
     VALUES_ENUM = core.MetadataEnum('tax-implication', _STDNAMES, _ALIASES)
     del _STDNAMES, _ALIASES
 
-    # Sometimes we accrue a payment before we have determined the recipient's
-    # tax status.
-    SKIP_FLAGS = '!'
-
     def __init__(self, config: configmod.Config) -> None:
         self.payment_threshold = -config.payment_threshold()
 
diff --git a/setup.py b/setup.py
index c51ddc4..5756e9c 100755
--- a/setup.py
+++ b/setup.py
@@ -5,7 +5,7 @@ from setuptools import setup
 setup(
     name='conservancy_beancount',
     description="Plugin, library, and reports for reading Conservancy's books",
-    version='1.16.1',
+    version='1.16.2',
     author='Software Freedom Conservancy',
     author_email='info@sfconservancy.org',
     license='GNU AGPLv3+',
diff --git a/tests/test_meta_expense_type.py b/tests/test_meta_expense_type.py
index 8e552ec..c1ca527 100644
--- a/tests/test_meta_expense_type.py
+++ b/tests/test_meta_expense_type.py
@@ -157,3 +157,13 @@ def test_flagged_txn_checked(hook, src_value):
     errors = list(hook.run(txn))
     assert errors
     testutil.check_post_meta(txn, None, {TEST_KEY: src_value})
+
+@pytest.mark.parametrize('src_value', testutil.FIXME_VALUES)
+def test_flagged_fixme_ok(hook, src_value):
+    txn = testutil.Transaction(flag='!', postings=[
+        ('Assets:Cash', -25),
+        ('Expenses:General', 25, {TEST_KEY: src_value}),
+    ])
+    errors = list(hook.run(txn))
+    assert not errors
+    testutil.check_post_meta(txn, None, {TEST_KEY: src_value})
diff --git a/tests/test_meta_income_type.py b/tests/test_meta_income_type.py
index bf922f4..d8171a9 100644
--- a/tests/test_meta_income_type.py
+++ b/tests/test_meta_income_type.py
@@ -151,3 +151,13 @@ def test_flagged_txn_checked(hook, src_value):
     errors = list(hook.run(txn))
     assert errors
     testutil.check_post_meta(txn, None, {TEST_KEY: src_value})
+
+@pytest.mark.parametrize('src_value', testutil.FIXME_VALUES)
+def test_flagged_fixme_ok(hook, src_value):
+    txn = testutil.Transaction(flag='!', postings=[
+        ('Assets:Cash', 25),
+        ('Income:Other', -25, {TEST_KEY: src_value}),
+    ])
+    errors = list(hook.run(txn))
+    assert not errors
+    testutil.check_post_meta(txn, None, {TEST_KEY: src_value})
diff --git a/tests/test_meta_paypal_id.py b/tests/test_meta_paypal_id.py
index 913ea56..05407cb 100644
--- a/tests/test_meta_paypal_id.py
+++ b/tests/test_meta_paypal_id.py
@@ -192,3 +192,15 @@ def test_still_required_on_flagged_txn(hook):
         ('Income:Donations', -1000),
     ])
     assert list(hook.run(txn))
+
+@pytest.mark.parametrize('account,src_value', testutil.combine_values(
+    ACCOUNTS,
+    testutil.FIXME_VALUES,
+))
+def test_flagged_fixme_ok(hook, account, src_value):
+    txn = testutil.Transaction(flag='!', postings=[
+        (account, 200, {TEST_KEY: src_value}),
+        ('Income:Donations', -200),
+    ])
+    assert not list(hook.run(txn))
+    testutil.check_post_meta(txn, {TEST_KEY: src_value}, None)
diff --git a/tests/test_meta_project.py b/tests/test_meta_project.py
index 3423fab..9c58b46 100644
--- a/tests/test_meta_project.py
+++ b/tests/test_meta_project.py
@@ -201,3 +201,13 @@ def test_still_required_on_flagged_txn(hook, src_value):
     errors = list(hook.run(txn))
     assert errors
     testutil.check_post_meta(txn, None, None)
+
+@pytest.mark.parametrize('src_value', testutil.FIXME_VALUES)
+def test_flagged_fixme_ok(hook, src_value):
+    txn = testutil.Transaction(flag='!', postings=[
+        ('Assets:Cash', -25),
+        ('Expenses:General', 25, {TEST_KEY: src_value}),
+    ])
+    errors = list(hook.run(txn))
+    assert not errors
+    testutil.check_post_meta(txn, None, {TEST_KEY: src_value})
diff --git a/tests/test_meta_tax_implication.py b/tests/test_meta_tax_implication.py
index 9c2aa31..520092d 100644
--- a/tests/test_meta_tax_implication.py
+++ b/tests/test_meta_tax_implication.py
@@ -137,9 +137,18 @@ def test_validation_only_in_date_range(hook, date, need_value):
     testutil.check_post_meta(txn, None, None)
 
 @pytest.mark.parametrize('src_value', INVALID_VALUES)
-def test_flagged_txn_skipped(hook, src_value):
+def test_flagged_txn_checked(hook, src_value):
     txn = testutil.Transaction(flag='!', **{TEST_KEY: src_value}, postings=[
         ('Liabilities:Payable:Accounts', 25),
         ('Assets:Cash', -25),
     ])
+    assert list(hook.run(txn))
+
+@pytest.mark.parametrize('src_value', testutil.FIXME_VALUES)
+def test_flagged_fixme_ok(hook, src_value):
+    txn = testutil.Transaction(flag='!', postings=[
+        ('Liabilities:Payable:Accounts', 25),
+        ('Assets:Cash', -25, {TEST_KEY: src_value}),
+    ])
     assert not list(hook.run(txn))
+    testutil.check_post_meta(txn, None, {TEST_KEY: src_value})
diff --git a/tests/testutil.py b/tests/testutil.py
index effca5c..a460ad6 100644
--- a/tests/testutil.py
+++ b/tests/testutil.py
@@ -194,6 +194,12 @@ NON_STRING_METADATA_VALUES = [
     Amount(500, None),
 ]
 
+FIXME_VALUES = [
+    'FIXME',
+    'FIXME loose comment',
+    'FIXME: comment with punctuation',
+]
+
 OPENING_EQUITY_ACCOUNTS = itertools.cycle([
     'Equity:Funds:Unrestricted',
     'Equity:Funds:Restricted',