diff --git a/hledger-lib/Hledger/Data/Journal.hs b/hledger-lib/Hledger/Data/Journal.hs
index 837e57077..a101212c4 100644
--- a/hledger-lib/Hledger/Data/Journal.hs
+++ b/hledger-lib/Hledger/Data/Journal.hs
@@ -79,6 +79,7 @@ module Hledger.Data.Journal (
   journalNumberAndTieTransactions,
   journalUntieTransactions,
   journalModifyTransactions,
+  journalApplyAliases,
   -- * Tests
   samplejournal,
   tests_Journal,
@@ -1226,6 +1227,11 @@ postingPivot fieldortagname p = p{paccount = pivotedacct, poriginal = Just $ ori
 postingFindTag :: TagName -> Posting -> Maybe (TagName, TagValue)
 postingFindTag tagname p = find ((tagname==) . fst) $ postingAllTags p
 
+-- | Apply some account aliases to all posting account names in the journal, as described by accountNameApplyAliases.
+-- This can raise an error arising from a bad replacement pattern in a regular expression alias.
+journalApplyAliases :: [AccountAlias] -> Journal -> Journal
+journalApplyAliases aliases j = j{jtxns = map (transactionApplyAliases aliases) $ jtxns j}  -- PARTIAL:
+  
 -- -- | Build a database of market prices in effect on the given date,
 -- -- from the journal's price directives.
 -- journalPrices :: Day -> Journal -> Prices
diff --git a/hledger-lib/Hledger/Data/Posting.hs b/hledger-lib/Hledger/Data/Posting.hs
index 006fb19ce..fd401e319 100644
--- a/hledger-lib/Hledger/Data/Posting.hs
+++ b/hledger-lib/Hledger/Data/Posting.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE NamedFieldPuns #-}
 {-|
 
 A 'Posting' represents a change (by some 'MixedAmount') of the balance in
@@ -37,6 +38,7 @@ module Hledger.Data.Posting (
   transactionAllTags,
   relatedPostings,
   removePrices,
+  postingApplyAliases,
   -- * date operations
   postingDate,
   postingDate2,
@@ -288,6 +290,16 @@ concatAccountNames :: [AccountName] -> AccountName
 concatAccountNames as = accountNameWithPostingType t $ T.intercalate ":" $ map accountNameWithoutPostingType as
     where t = headDef RegularPosting $ filter (/= RegularPosting) $ map accountNamePostingType as
 
+-- | Apply some account aliases to the posting's account name, as described by accountNameApplyAliases.
+-- This can raise an error arising from a bad replacement pattern in a regular expression alias.
+postingApplyAliases :: [AccountAlias] -> Posting -> Posting
+postingApplyAliases aliases p@Posting{paccount} =
+  case accountNameApplyAliases aliases paccount of
+    Right a -> p{paccount=a}
+    Left e  -> error' err  -- PARTIAL:
+      where
+        err = "problem in account aliases:\n" ++ pshow aliases ++ "\n applied to account name: "++T.unpack paccount++"\n "++e
+
 -- | Rewrite an account name using all matching aliases from the given list, in sequence.
 -- Each alias sees the result of applying the previous aliases.
 -- Or, return any error arising from a bad regular expression in the aliases.
diff --git a/hledger-lib/Hledger/Data/Transaction.hs b/hledger-lib/Hledger/Data/Transaction.hs
index ae584ed48..4dc562104 100644
--- a/hledger-lib/Hledger/Data/Transaction.hs
+++ b/hledger-lib/Hledger/Data/Transaction.hs
@@ -33,6 +33,7 @@ module Hledger.Data.Transaction (
   transactionTransformPostings,
   transactionApplyValuation,
   transactionToCost,
+  transactionApplyAliases,
   -- nonzerobalanceerror,
   -- * date operations
   transactionDate2,
@@ -591,6 +592,12 @@ transactionApplyValuation priceoracle styles periodlast mreportlast today ismult
 transactionToCost :: M.Map CommoditySymbol AmountStyle -> Transaction -> Transaction
 transactionToCost styles t@Transaction{tpostings=ps} = t{tpostings=map (postingToCost styles) ps}
 
+-- | Apply some account aliases to all posting account names in the transaction, as described by accountNameApplyAliases.
+-- This can raise an error arising from a bad replacement pattern in a regular expression alias.
+transactionApplyAliases :: [AccountAlias] -> Transaction -> Transaction
+transactionApplyAliases aliases t =
+  txnTieKnot $ t{tpostings = map (postingApplyAliases aliases) $ tpostings t}  -- PARTIAL:
+
 -- tests
 
 tests_Transaction :: TestTree
diff --git a/hledger-lib/Hledger/Read.hs b/hledger-lib/Hledger/Read.hs
index 84a3a270d..c9e2a3c9a 100644
--- a/hledger-lib/Hledger/Read.hs
+++ b/hledger-lib/Hledger/Read.hs
@@ -32,7 +32,6 @@ module Hledger.Read (
   readJournal',
 
   -- * Re-exported
-  JournalReader.accountaliasp,
   JournalReader.postingp,
   findReader,
   splitReaderPrefix,
diff --git a/hledger-lib/Hledger/Read/Common.hs b/hledger-lib/Hledger/Read/Common.hs
index 6a9072ff2..358c9c150 100644
--- a/hledger-lib/Hledger/Read/Common.hs
+++ b/hledger-lib/Hledger/Read/Common.hs
@@ -75,6 +75,9 @@ module Hledger.Read.Common (
   modifiedaccountnamep,
   accountnamep,
 
+  -- ** account aliases
+  accountaliasp,
+
   -- ** amounts
   spaceandamountormissingp,
   amountp,
@@ -103,9 +106,9 @@ module Hledger.Read.Common (
   singlespacedtextp,
   singlespacedtextsatisfyingp,
   singlespacep,
-
   skipNonNewlineSpaces,
   skipNonNewlineSpaces1,
+  aliasesFromOpts,
 
   -- * tests
   tests_Common,
@@ -279,6 +282,7 @@ parseAndFinaliseJournal parser iopts f txt = do
                   Right pj -> journalFinalise iopts f txt pj
 
 -- | Like parseAndFinaliseJournal but takes a (non-Erroring) JournalParser.
+-- Also, applies command-line account aliases before finalising.
 -- Used for timeclock/timedot.
 -- TODO: get rid of this, use parseAndFinaliseJournal instead
 parseAndFinaliseJournal' :: JournalParser IO ParsedJournal -> InputOpts
@@ -292,7 +296,10 @@ parseAndFinaliseJournal' parser iopts f txt = do
   -- see notes above
   case ep of
     Left e   -> throwError $ customErrorBundlePretty e
-    Right pj -> journalFinalise iopts f txt pj
+    Right pj -> journalFinalise iopts f txt $
+                -- apply any command line account aliases. Can fail with a bad replacement pattern.
+                journalApplyAliases (aliasesFromOpts iopts) $  -- PARTIAL:
+                pj
 
 -- | Post-process a Journal that has just been parsed or generated, in this order:
 --
@@ -1371,6 +1378,39 @@ bracketeddatetagsp mYear1 = do
 
 {-# INLINABLE bracketeddatetagsp #-}
 
+-- | Get the account name aliases from options, if any.
+aliasesFromOpts :: InputOpts -> [AccountAlias]
+aliasesFromOpts = map (\a -> fromparse $ runParser accountaliasp ("--alias "++quoteIfNeeded a) $ T.pack a)
+                  . aliases_
+
+accountaliasp :: TextParser m AccountAlias
+accountaliasp = regexaliasp <|> basicaliasp
+
+basicaliasp :: TextParser m AccountAlias
+basicaliasp = do
+  -- dbgparse 0 "basicaliasp"
+  old <- rstrip <$> (some $ noneOf ("=" :: [Char]))
+  char '='
+  skipNonNewlineSpaces
+  new <- rstrip <$> anySingle `manyTill` eolof  -- eol in journal, eof in command lines, normally
+  return $ BasicAlias (T.pack old) (T.pack new)
+
+regexaliasp :: TextParser m AccountAlias
+regexaliasp = do
+  -- dbgparse 0 "regexaliasp"
+  char '/'
+  off1 <- getOffset
+  re <- some $ noneOf ("/\n\r" :: [Char]) -- paranoid: don't try to read past line end
+  off2 <- getOffset
+  char '/'
+  skipNonNewlineSpaces
+  char '='
+  skipNonNewlineSpaces
+  repl <- anySingle `manyTill` eolof
+  case toRegexCI re of
+    Right r -> return $! RegexAlias r repl
+    Left e  -> customFailure $! parseErrorAtRegion off1 off2 e
+
 --- ** tests
 
 tests_Common = tests "Common" [
diff --git a/hledger-lib/Hledger/Read/CsvReader.hs b/hledger-lib/Hledger/Read/CsvReader.hs
index d69e3794b..ab93a3ce8 100644
--- a/hledger-lib/Hledger/Read/CsvReader.hs
+++ b/hledger-lib/Hledger/Read/CsvReader.hs
@@ -78,7 +78,7 @@ import Text.Printf (printf)
 
 import Hledger.Data
 import Hledger.Utils
-import Hledger.Read.Common ( Reader(..),InputOpts(..), amountp, statusp, genericSourcePos, journalFinalise )
+import Hledger.Read.Common (aliasesFromOpts,  Reader(..),InputOpts(..), amountp, statusp, genericSourcePos, journalFinalise )
 
 --- ** doctest setup
 -- $setup
@@ -108,13 +108,15 @@ parse iopts f t = do
   let rulesfile = mrules_file_ iopts
   r <- liftIO $ readJournalFromCsv rulesfile f t
   case r of Left e   -> throwError e
-            Right pj -> journalFinalise iopts{ignore_assertions_=True} f t pj'
+            Right pj -> journalFinalise iopts{ignore_assertions_=True} f t pj''
               where
                 -- journalFinalise assumes the journal's items are
                 -- reversed, as produced by JournalReader's parser.
                 -- But here they are already properly ordered. So we'd
                 -- better preemptively reverse them once more. XXX inefficient
                 pj' = journalReverse pj
+                -- apply any command line account aliases. Can fail with a bad replacement pattern.
+                pj'' = journalApplyAliases (aliasesFromOpts iopts)  pj'  -- PARTIAL:
 
 --- ** reading rules files
 --- *** rules utilities
diff --git a/hledger-lib/Hledger/Read/JournalReader.hs b/hledger-lib/Hledger/Read/JournalReader.hs
index 509069f8f..0b941e309 100644
--- a/hledger-lib/Hledger/Read/JournalReader.hs
+++ b/hledger-lib/Hledger/Read/JournalReader.hs
@@ -179,11 +179,6 @@ parse iopts = parseAndFinaliseJournal journalp' iopts
       mapM_ addAccountAlias (reverse $ aliasesFromOpts iopts)
       journalp
 
--- | Get the account name aliases from options, if any.
-aliasesFromOpts :: InputOpts -> [AccountAlias]
-aliasesFromOpts = map (\a -> fromparse $ runParser accountaliasp ("--alias "++quoteIfNeeded a) $ T.pack a)
-                  . aliases_
-
 --- ** parsers
 --- *** journal
 
@@ -505,34 +500,6 @@ aliasdirectivep = do
   alias <- lift accountaliasp
   addAccountAlias alias
 
-accountaliasp :: TextParser m AccountAlias
-accountaliasp = regexaliasp <|> basicaliasp
-
-basicaliasp :: TextParser m AccountAlias
-basicaliasp = do
-  -- dbgparse 0 "basicaliasp"
-  old <- rstrip <$> (some $ noneOf ("=" :: [Char]))
-  char '='
-  skipNonNewlineSpaces
-  new <- rstrip <$> anySingle `manyTill` eolof  -- eol in journal, eof in command lines, normally
-  return $ BasicAlias (T.pack old) (T.pack new)
-
-regexaliasp :: TextParser m AccountAlias
-regexaliasp = do
-  -- dbgparse 0 "regexaliasp"
-  char '/'
-  off1 <- getOffset
-  re <- some $ noneOf ("/\n\r" :: [Char]) -- paranoid: don't try to read past line end
-  off2 <- getOffset
-  char '/'
-  skipNonNewlineSpaces
-  char '='
-  skipNonNewlineSpaces
-  repl <- anySingle `manyTill` eolof
-  case toRegexCI re of
-    Right r -> return $! RegexAlias r repl
-    Left e  -> customFailure $! parseErrorAtRegion off1 off2 e
-
 endaliasesdirectivep :: JournalParser m ()
 endaliasesdirectivep = do
   keywordsp "end aliases" <?> "end aliases directive"
diff --git a/hledger-lib/hledger_timedot.m4.md b/hledger-lib/hledger_timedot.m4.md
index 2cdfa73be..09c300592 100644
--- a/hledger-lib/hledger_timedot.m4.md
+++ b/hledger-lib/hledger_timedot.m4.md
@@ -147,7 +147,7 @@ fos.hledger.timedot  4
 fos.ledger           ..
 ```
 ```shell
-$ hledger -f t.timedot --alias /\\./=: bal date:2016/2/4
+$ hledger -f t.timedot --alias /\\./=: bal date:2016/2/4 --tree
                 4.50  fos
                 4.00    hledger:timedot
                 0.50    ledger
diff --git a/hledger/test/csv.test b/hledger/test/csv.test
index c28bd6723..8311e50c3 100644
--- a/hledger/test/csv.test
+++ b/hledger/test/csv.test
@@ -926,7 +926,7 @@ $  ./csvtest.sh
 
 >=
 
-# 46. 
+# 46. decimal-mark again
 <
 2020-01-01,"1,000"
 2020-01-02,"1.000"
@@ -946,6 +946,19 @@ $  ./csvtest.sh
 
 >=
 
+# 47. Account aliases work when reading from CSV.
+<
+2020-01-01,10
+
+RULES
+fields date,amount
+
+$  ./csvtest.sh --alias expenses=FOO
+2020-01-01
+    FOO:unknown                 10
+    income:unknown             -10
+
+>=
 
 ## . 
 #<
diff --git a/hledger/test/timeclock.test b/hledger/test/timeclock.test
index d0ee26073..765a7d9e2 100644
--- a/hledger/test/timeclock.test
+++ b/hledger/test/timeclock.test
@@ -22,6 +22,19 @@ $ hledger -f timeclock:- print
 >2
 >= 0
 
+# Command-line account aliases are applied.
+$ hledger -ftimeclock:- print --alias '/account/=FOO'
+2009-01-01 * 08:00-09:00
+    ()           1.00h
+
+2009-01-02 * 08:00-09:00
+    (FOO name)           1.00h
+
+2009-01-03 * and a description
+    (some:FOO name)           1.00h
+
+>= 0
+
 # For a missing clock-out, now is implied
 <
 i 2020/1/1 08:00
diff --git a/hledger/test/timedot.test b/hledger/test/timedot.test
index bee15d136..1525fe26a 100644
--- a/hledger/test/timedot.test
+++ b/hledger/test/timedot.test
@@ -29,3 +29,9 @@ $ hledger -ftimedot:- print
 
 >=0
 
+# 3. Command-line account aliases are applied.
+$ hledger -ftimedot:- print --alias a=b
+2020-01-01 *
+    (b:aa)            1.00
+
+>=0