Account (FIX tag 1)

StringFIX 4.4FIX 4.2FIX 5.0 SP2

Account (tag 1) is a String field defined in FIX 4.4, FIX 4.2 and FIX 5.0 SP2. It appears in 38 message types and is required in 5 of them.

At a glance

Tag: 1
Name: Account
Datatype: String
Dialects: FIX 4.4, FIX 4.2 and FIX 5.0 SP2
Messages: 38

What the specification says

FIX 4.4

Account mnemonic as agreed between buy and sell sides, e.g. broker and institution or investor/intermediary and fund manager.

FIX 4.2

Account mnemonic as agreed between broker and institution.

FIX 5.0 SP2

Account mnemonic as agreed between buy and sell sides, e.g. broker and institution or investor/intermediary and fund manager.

Descriptions are quoted from the FIX Orchestra sources under the Apache 2.0 licence.

A real message using tag 1

NewOrderSingle · FIX 4.4

Tag	Field	Wire value	Meaning
8	BeginString	FIX.4.4
9	BodyLength	124
35	MsgType	D	Order – Single
49	SenderCompID	BOARTEAM
56	TargetCompID	COUNTERPARTY
34	MsgSeqNum	2
52	SendingTime	20240101-12:00:00.000
11	ClOrdID	ORD-10042
1	Account	ACCT-11223
54	Side	1	Buy
60	TransactTime	20240101-12:00:00.000
40	OrdType	1	Market
10	CheckSum	164

Edit and decode it yourself

Shown with | separators for readability. On the wire FIX uses SOH (0x01), an invisible control byte — and because BodyLength and CheckSum are computed over the actual bytes, the two forms have different checksums. Both are valid and both decode here.

Open in the full decoder →

Generated from the FIX 4.4 dictionary and verified at build time: it parses and validates with no issues. Open the decoder to try your own message.

Where tag 1 appears

Requiredness is a property of the message, not of the field: the same tag can be optional in one message and conditionally required in another.

Message	MsgType	FIX 4.4	FIX 4.2	FIX 5.0 SP2	Where in the message
AssignmentReport	AW	Optional	—	Optional	directly on the message body
BidRequest	k	Optional	Optional	Optional	inside the BidCompReqGrp component
CollateralAssignment	AY	Optional	—	Optional	directly on the message body
CollateralInquiry	BB	Optional	—	Optional	directly on the message body
CollateralInquiryAck	BG	Optional	—	Optional	directly on the message body
CollateralReport	BA	Optional	—	Optional	directly on the message body
CollateralRequest	AX	Optional	—	Optional	directly on the message body
CollateralResponse	AZ	Optional	—	Optional	directly on the message body
CrossOrderCancelReplaceRequest	t	Optional	—	Optional	inside the SideCrossOrdModGrp component
ExecutionReport	8	Optional	Optional	Optional	directly on the message body
MassQuote	i	Optional	—	Optional	directly on the message body
MassQuoteAcknowledgement	b	Optional	—	Optional	directly on the message body
MultilegOrderCancelReplace	AC	Optional	—	Optional	directly on the message body
NewOrderCross	s	Optional	—	Optional	inside the SideCrossOrdModGrp component
NewOrderList	E	Optional	Optional	Optional	inside the ListOrdGrp component
NewOrderMultileg	AB	Optional	—	Optional	directly on the message body
NewOrderSingle	D	Optional	Optional	Optional	directly on the message body
OrderCancelReject	9	Optional	Optional	Optional	directly on the message body
OrderCancelReplaceRequest	G	Optional	Optional	Optional	directly on the message body
OrderCancelRequest	F	Optional	Optional	Optional	directly on the message body
OrderMassStatusRequest	AF	Optional	—	Optional	directly on the message body
OrderStatusRequest	H	Optional	Optional	Optional	directly on the message body
PositionMaintenanceReport	AM	Required	—	Optional	directly on the message body
PositionMaintenanceRequest	AL	Required	—	Optional	directly on the message body
PositionReport	AP	Required	—	Optional	directly on the message body
Quote	S	Optional	—	Optional	directly on the message body
QuoteCancel	Z	Optional	—	Optional	directly on the message body
QuoteRequest	R	Optional	—	Optional	inside the QuotReqGrp component
QuoteRequestReject	AG	Optional	—	Optional	inside the QuotReqRjctGrp component
QuoteResponse	AJ	Optional	—	Optional	directly on the message body
QuoteStatusReport	AI	Optional	—	Optional	directly on the message body
QuoteStatusRequest	a	Optional	—	Optional	directly on the message body
RegistrationInstructions	o	Optional	—	Optional	directly on the message body
RegistrationInstructionsResponse	p	Optional	—	Optional	directly on the message body
RequestForPositions	AN	Required	—	Optional	directly on the message body
RequestForPositionsAck	AO	Required	—	Optional	directly on the message body
TradeCaptureReport	AE	Optional	—	Optional	inside the TrdCapRptSideGrp component
TradeCaptureReportAck	AR	Optional	—	Optional	directly on the message body

Wire format

Free-form text. Any byte except the SOH separator is legal, so values are not trimmed or case-folded on the wire. @boarteam/fix keeps the value as a string; format rules are checked by validate(), which reports validate/invalid-value rather than throwing.

Read tag 1 in TypeScript

decode.tsts

import { createFixEngine } from "@boarteam/fix";import { dictionary } from "@boarteam/fix-dict-fix44";const fix = createFixEngine(dictionary);const { message, issues } = fix.parse(raw);const field = message.fields[1];field?.name;   // "Account"field?.raw;    // the verbatim wire stringfield?.value;  // coerced to a string

Decode this in your own code

The same engine that produced the decoded example above is an Apache-2.0 npm package with zero runtime dependencies. It runs in Node and in the browser, and parse() returns problems as data instead of throwing.

npm i @boarteam/fix @boarteam/fix-dict-fix44

Try the decoder Source on GitHub