diff --git a/src/ledger/delta.go b/src/ledger/delta.go
index 7be4a5d..066a5bc 100644
--- a/src/ledger/delta.go
+++ b/src/ledger/delta.go
@@ -15,9 +15,10 @@ type Delta struct {
 	Currency    Currency
 	Description string
 	isSet       bool
+	transaction string
 }
 
-func newDelta(d, desc, name string, v float64, c string, isSet bool) Delta {
+func newDelta(transaction string, d, desc, name string, v float64, c string, isSet bool) Delta {
 	return Delta{
 		Date:        d,
 		Name:        name,
@@ -25,6 +26,7 @@ func newDelta(d, desc, name string, v float64, c string, isSet bool) Delta {
 		Currency:    Currency(c),
 		Description: desc,
 		isSet:       isSet,
+		transaction: transaction,
 	}
 }
 
diff --git a/src/ledger/delta_test.go b/src/ledger/delta_test.go
index ec91730..727adc3 100644
--- a/src/ledger/delta_test.go
+++ b/src/ledger/delta_test.go
@@ -6,8 +6,11 @@ import (
 
 func TestDelta(t *testing.T) {
 	d := "2099-08-07"
-	delta := newDelta(d, "", "name", 34.56, "$", false)
+	delta := newDelta("x", d, "", "name", 34.56, "$", false)
 
+	if delta.transaction != "x" {
+		t.Error(delta.transaction)
+	}
 	if delta.Date != d {
 		t.Error(delta.Date)
 	}
diff --git a/src/ledger/file.go b/src/ledger/file.go
index 7591940..98642ea 100644
--- a/src/ledger/file.go
+++ b/src/ledger/file.go
@@ -212,6 +212,7 @@ func (files Files) Deltas(like ...Like) (Deltas, error) {
 		for _, recipient := range transaction.recipients {
 			sums[recipient.currency] += recipient.value
 			delta := newDelta(
+				transaction.name,
 				transaction.date,
 				transaction.description,
 				recipient.name,
@@ -229,6 +230,7 @@ func (files Files) Deltas(like ...Like) (Deltas, error) {
 				//return nil, fmt.Errorf("didnt find net zero and no dumping ground payee set: %+v", transaction)
 			} else {
 				delta := newDelta(
+					transaction.name,
 					transaction.date,
 					transaction.description,
 					transaction.payee,
diff --git a/src/ledger/file_test.go b/src/ledger/file_test.go
index 8150691..ed09328 100644
--- a/src/ledger/file_test.go
+++ b/src/ledger/file_test.go
@@ -271,6 +271,10 @@ func TestFileDeltas(t *testing.T) {
 				if i >= len(deltas) {
 					break
 				}
+				if deltas[i].transaction == "" {
+					t.Error(deltas[i].transaction)
+				}
+				deltas[i].transaction = ""
 				if want[i] != deltas[i] {
 					t.Errorf("[%d] \n\twant=%s, \n\t got=%s", i, want[i].Debug(), deltas[i].Debug())
 				}
diff --git a/src/ledger/transaction.go b/src/ledger/transaction.go
index 2249e13..ddfbf26 100644
--- a/src/ledger/transaction.go
+++ b/src/ledger/transaction.go
@@ -16,6 +16,7 @@ type transaction struct {
 	description string
 	payee       string
 	recipients  []transactionRecipient
+	name        string
 }
 
 func (t transaction) empty() bool {
@@ -59,7 +60,8 @@ func (files Files) _transactions(file string) ([]transaction, error) {
 
 	result := make([]transaction, 0)
 	for {
-		one, err := readTransaction(r)
+		name := fmt.Sprintf("%s/%d", file, len(result))
+		one, err := readTransaction(name, r)
 		if !one.empty() {
 			result = append(result, one)
 		}
@@ -72,8 +74,8 @@ func (files Files) _transactions(file string) ([]transaction, error) {
 	}
 }
 
-func readTransaction(r *bufio.Reader) (transaction, error) {
-	result, err := _readTransaction(r)
+func readTransaction(name string, r *bufio.Reader) (transaction, error) {
+	result, err := _readTransaction(name, r)
 	if err != nil {
 		return result, err
 	}
@@ -89,7 +91,7 @@ func readTransaction(r *bufio.Reader) (transaction, error) {
 	return result, nil
 }
 
-func _readTransaction(r *bufio.Reader) (transaction, error) {
+func _readTransaction(name string, r *bufio.Reader) (transaction, error) {
 	readTransactionLeadingWhitespace(r)
 
 	firstLine, err := readTransactionLine(r)
@@ -107,6 +109,7 @@ func _readTransaction(r *bufio.Reader) (transaction, error) {
 	result := transaction{
 		date:        string(dateDescriptionMatches[0][1]),
 		description: string(dateDescriptionMatches[0][2]),
+		name:        name,
 	}
 
 	for {
diff --git a/src/ledger/transaction_test.go b/src/ledger/transaction_test.go
index 0056133..2f6315c 100644
--- a/src/ledger/transaction_test.go
+++ b/src/ledger/transaction_test.go
@@ -55,7 +55,7 @@ func TestReadTransaction(t *testing.T) {
 		c := d
 		t.Run(name, func(t *testing.T) {
 			r := bufio.NewReader(strings.NewReader(c.input))
-			got, err := readTransaction(r)
+			got, err := readTransaction("", r)
 			if err != c.err {
 				t.Error(err)
 			}