diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,11 @@
 # Changelog for [hledger-flow](https://github.com/apauley/hledger-flow)
 
+## 0.16.4
+
+- Add a new command-line option: `--hledger-conf /path/to/hledger/conf`.
+  This allows specifying a hledger config file, causing hledger-flow to pass
+  `--conf /path/to/hledger/conf` to any hledger command it invokes.
+
 ## 0.16.3
 
 - Change `--new-files-only` to use modification time comparison instead of existence check.
diff --git a/app/Main.hs b/app/Main.hs
--- a/app/Main.hs
+++ b/app/Main.hs
@@ -46,6 +46,7 @@
 
 data MainParams = MainParams { verbosity :: Int
                              , hledgerPathOpt :: Maybe TurtlePath
+                             , hledgerConfOpt :: Maybe TurtlePath
                              , showOpts :: Bool
                              , batchSize :: Maybe Int
                              , sequential :: Bool
@@ -85,6 +86,7 @@
                            , RT.onlyNewFiles = onlyNewFiles subParams'
                            , RT.hfVersion = versionInfo sysInfo
                            , RT.hledgerInfo = hli
+                           , RT.hledgerConf = hledgerConfOpt mainParams'
                            , RT.sysInfo = sysInfo
                            , RT.verbose = verbosity mainParams' > 0
                            , RT.showOptions = showOpts mainParams'
@@ -106,6 +108,7 @@
                            , RT.onlyNewFiles = False
                            , RT.hfVersion = versionInfo sysInfo
                            , RT.hledgerInfo = hli
+                           , RT.hledgerConf = hledgerConfOpt mainParams'
                            , RT.sysInfo = sysInfo
                            , RT.verbose = verbosity mainParams' > 0
                            , RT.showOptions = showOpts mainParams'
@@ -126,6 +129,7 @@
 verboseParser = MainParams
   <$> (length <$> many (flag' () (long "verbose" <> short 'v' <> help "Print more verbose output")))
   <*> optional (Turtle.optPath "hledger-path" 'H' "The full path to an hledger executable")
+  <*> optional (option str (long "hledger-conf" <> metavar "PATH" <> help "The hledger config file to pass to hledger --conf"))
   <*> switch (long "show-options" <> help "Print the options this program will run with")
   <*> optional (option auto (long "batch-size" <> metavar "SIZE" <> help ("Parallel processing of files are done in batches of the specified size. Default: " <> show defaultBatchSize <> ". Ignored during sequential processing.")))
   <*> switch (long "sequential" <> help "Disable parallel processing")
diff --git a/hledger-flow.cabal b/hledger-flow.cabal
--- a/hledger-flow.cabal
+++ b/hledger-flow.cabal
@@ -1,13 +1,11 @@
 cabal-version: 1.12
 
--- This file has been generated from package.yaml by hpack version 0.37.0.
+-- This file has been generated from package.yaml by hpack version 0.39.6.
 --
 -- see: https://github.com/sol/hpack
---
--- hash: 1b63379a0d0b0c58f45cec49ae2eae3f1f4408ac97b070977ba5c1bce02f8f05
 
 name:           hledger-flow
-version:        0.16.3
+version:        0.16.4
 synopsis:       An hledger workflow focusing on automated statement import and classification.
 description:    Please see the README on GitHub at <https://github.com/apauley/hledger-flow#readme>
 category:       Finance, Console
diff --git a/src/Hledger/Flow/Common.hs b/src/Hledger/Flow/Common.hs
--- a/src/Hledger/Flow/Common.hs
+++ b/src/Hledger/Flow/Common.hs
@@ -21,6 +21,7 @@
 import Hledger.Flow.BaseDir (relativeToBase, turtleBaseDir)
 import Hledger.Flow.Logging
 import Hledger.Flow.PathHelpers (AbsFile, TurtlePath, fromTurtleAbsFile, pathToTurtle)
+import qualified Hledger.Flow.RuntimeOptions as RT
 import Hledger.Flow.Types
 import Path (absfile, relfile)
 import qualified Path.IO as Path
@@ -58,6 +59,12 @@
   hlp <- hledgerPathFromOption pathOption
   hlv <- hledgerVersionFromPath $ pathToTurtle hlp
   return $ HledgerInfo hlp hlv
+
+hledgerConfArgs :: RT.RuntimeOptions -> [T.Text]
+hledgerConfArgs opts =
+  case RT.hledgerConf opts of
+    Nothing -> []
+    Just conf -> ["--conf", Turtle.format Turtle.fp conf]
 
 showCmdArgs :: [T.Text] -> T.Text
 showCmdArgs args = T.intercalate " " (map escapeArg args)
diff --git a/src/Hledger/Flow/Import/CSVImport.hs b/src/Hledger/Flow/Import/CSVImport.hs
--- a/src/Hledger/Flow/Import/CSVImport.hs
+++ b/src/Hledger/Flow/Import/CSVImport.hs
@@ -177,7 +177,7 @@
       directivesExist <- Turtle.testfile $ directivesFile opts
       let directivesArgs = if directivesExist then ["--file", Turtle.format Turtle.fp (directivesFile opts)] else []
       let csvArgs = ["--file", Turtle.format Turtle.fp csvSrc, "--rules-file", Turtle.format Turtle.fp rf]
-      let args = ["print", "--explicit"] ++ directivesArgs ++ csvArgs
+      let args = hledgerConfArgs opts ++ ["print", "--explicit"] ++ directivesArgs ++ csvArgs
 
       let cmdLabel = Turtle.format ("importing '" % Turtle.fp % "' using rules file '" % Turtle.fp % "'") relCSV relRules
       ((_, stdOut, _), _) <- timeAndExitOnErr opts ch cmdLabel dummyLogger channelErr (parAwareProc opts) (hledger, args, Turtle.empty)
@@ -241,13 +241,14 @@
   let stdLines = inprocWithErrFun (channelErrLn ch) (script, constructArgs, Turtle.empty)
   let hledger = Turtle.format Turtle.fp $ pathToTurtle . FlowTypes.hlPath . hledgerInfo $ opts :: T.Text
   let args =
-        [ "print",
-          "--ignore-assertions",
-          "--file",
-          "-",
-          "--output-file",
-          Turtle.format Turtle.fp journalOut
-        ]
+        hledgerConfArgs opts
+          ++ [ "print",
+               "--ignore-assertions",
+               "--file",
+               "-",
+               "--output-file",
+               Turtle.format Turtle.fp journalOut
+             ]
 
   let relSrc = relativeToBase opts csvSrc
   let cmdLabel = Turtle.format ("executing '" % Turtle.fp % "' on '" % Turtle.fp % "'") relScript relSrc
diff --git a/src/Hledger/Flow/Reports.hs b/src/Hledger/Flow/Reports.hs
--- a/src/Hledger/Flow/Reports.hs
+++ b/src/Hledger/Flow/Reports.hs
@@ -114,8 +114,9 @@
   let outputFile = reportsDir </> fileName
   let relativeJournal = relativeToBase opts journal
   let relativeOutputFile = relativeToBase opts outputFile
-  let reportArgs = ["--file", Turtle.format Turtle.fp journal, "--period", Turtle.repr year] ++ args
-  let reportDisplayArgs = ["--file", Turtle.format Turtle.fp relativeJournal, "--period", Turtle.repr year] ++ args
+  let confArgs = hledgerConfArgs opts
+  let reportArgs = confArgs ++ ["--file", Turtle.format Turtle.fp journal, "--period", Turtle.repr year] ++ args
+  let reportDisplayArgs = confArgs ++ ["--file", Turtle.format Turtle.fp relativeJournal, "--period", Turtle.repr year] ++ args
   let hledger = Turtle.format Turtle.fp $ pathToTurtle . FlowTypes.hlPath . hledgerInfo $ opts :: T.Text
   let cmdLabel = Turtle.format ("hledger " % Turtle.s) $ showCmdArgs reportDisplayArgs
   ((exitCode, stdOut, _), _) <- timeAndExitOnErr opts ch cmdLabel dummyLogger channelErr Turtle.procStrictWithErr (hledger, reportArgs, mempty)
diff --git a/src/Hledger/Flow/RuntimeOptions.hs b/src/Hledger/Flow/RuntimeOptions.hs
--- a/src/Hledger/Flow/RuntimeOptions.hs
+++ b/src/Hledger/Flow/RuntimeOptions.hs
@@ -2,6 +2,7 @@
 
 import qualified Data.Text as T
 import Hledger.Flow.Internals (SystemInfo)
+import Hledger.Flow.PathHelpers (TurtlePath)
 import Hledger.Flow.Types
 import Prelude hiding (putStrLn)
 
@@ -12,6 +13,7 @@
     onlyNewFiles :: Bool,
     hfVersion :: T.Text,
     hledgerInfo :: HledgerInfo,
+    hledgerConf :: Maybe TurtlePath,
     sysInfo :: SystemInfo,
     verbose :: Bool,
     showOptions :: Bool,
@@ -22,19 +24,19 @@
   deriving (Show)
 
 instance HasVerbosity RuntimeOptions where
-  verbose (RuntimeOptions _ _ _ _ _ _ _ v _ _ _ _) = v
+  verbose (RuntimeOptions _ _ _ _ _ _ _ _ v _ _ _ _) = v
 
 instance HasSequential RuntimeOptions where
-  sequential (RuntimeOptions _ _ _ _ _ _ _ _ _ sq _ _) = sq
+  sequential (RuntimeOptions _ _ _ _ _ _ _ _ _ _ sq _ _) = sq
 
 instance HasBatchSize RuntimeOptions where
-  batchSize (RuntimeOptions _ _ _ _ _ _ _ _ _ _ bs _) = bs
+  batchSize (RuntimeOptions _ _ _ _ _ _ _ _ _ _ _ bs _) = bs
 
 instance HasBaseDir RuntimeOptions where
-  baseDir (RuntimeOptions bd _ _ _ _ _ _ _ _ _ _ _) = bd
+  baseDir (RuntimeOptions bd _ _ _ _ _ _ _ _ _ _ _ _) = bd
 
 instance HasRunDir RuntimeOptions where
-  importRunDir (RuntimeOptions _ rd _ _ _ _ _ _ _ _ _ _) = rd
+  importRunDir (RuntimeOptions _ rd _ _ _ _ _ _ _ _ _ _ _) = rd
 
 instance HasPrettyReports RuntimeOptions where
-  prettyReports (RuntimeOptions _ _ _ _ _ _ _ _ _ _ _ pr) = pr
+  prettyReports (RuntimeOptions _ _ _ _ _ _ _ _ _ _ _ _ pr) = pr
diff --git a/test/Common/Unit.hs b/test/Common/Unit.hs
--- a/test/Common/Unit.hs
+++ b/test/Common/Unit.hs
@@ -1,13 +1,17 @@
 {-# LANGUAGE OverloadedLists #-}
 {-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE QuasiQuotes #-}
 
 module Common.Unit where
 
 import Hledger.Flow.BaseDir (relativeToBase')
 import Hledger.Flow.Common
+import Hledger.Flow.RuntimeOptions (RuntimeOptions (hledgerConf))
 import qualified Data.List as List
 import qualified Data.Map.Strict as Map
+import Path (absdir)
 import Test.HUnit
+import TestHelpers (defaultOpts)
 
 testShowCmdArgs :: Test
 testShowCmdArgs =
@@ -19,6 +23,17 @@
         assertEqual "Convert command-line arguments to text" expected actual
     )
 
+testHledgerConfArgs :: Test
+testHledgerConfArgs =
+  TestCase
+    ( do
+        let optsWithoutConf = defaultOpts [absdir|/base/|]
+        assertEqual "No hledger config should produce no hledger config args" [] (hledgerConfArgs optsWithoutConf)
+
+        let optsWithConf = optsWithoutConf {hledgerConf = Just "/tmp/hledger.conf"}
+        assertEqual "Configured hledger config should produce --conf args" ["--conf", "/tmp/hledger.conf"] (hledgerConfArgs optsWithConf)
+    )
+
 testRelativeToBase :: Test
 testRelativeToBase =
   TestCase
@@ -98,4 +113,4 @@
     )
 
 tests :: Test
-tests = TestList [testShowCmdArgs, testRelativeToBase, testExtractDigits, testChangePathAndExtension, testGroupValuesBy]
+tests = TestList [testShowCmdArgs, testHledgerConfArgs, testRelativeToBase, testExtractDigits, testChangePathAndExtension, testGroupValuesBy]
diff --git a/test/TestHelpers.hs b/test/TestHelpers.hs
--- a/test/TestHelpers.hs
+++ b/test/TestHelpers.hs
@@ -34,6 +34,7 @@
       onlyNewFiles = False,
       hfVersion = versionInfo testSystemInfo,
       hledgerInfo = defaultHlInfo,
+      hledgerConf = Nothing,
       sysInfo = testSystemInfo,
       verbose = False,
       showOptions = False,