Justice Brennan
delivered the opinion of the Court.
The question for decision is whether respondents’ state-law complaint for breach of individual employment contracts is completely pre-empted by §301 of the Labor Management Relations Act, 1947 (LMRA), 61 Stat. 156, 29 U. S. C. § 185, and therefore removable to Federal District Court.
h-i
At various times between 1956 and 1968, Caterpillar Tractor Company (Caterpillar) hired respondents to work at its San Leandro, California, facility. Complaint ¶¶ 10-26, App. to Pet. for Cert. (App.) A-40 — A-42. Initially, each respondent filled a position covered by the collective-bargaining agreement between Caterpillar and Local Lodge No. 284, International Association of Machinists (Union). Each eventually became either a managerial or a weekly salaried employee, positions outside the coverage of the collective-bargaining agreement. Respondents held the latter positions for periods ranging from 3 to 15 years; all but two respondents served 8 years or more. App. A-97 — A-98.
Respondents allege that, “[djuring the course of [their] employment, as management or weekly salaried employees,” Caterpillar made oral and written representations that “they could look forward to indefinite and lasting employment with the corporation and that they could count on the corporation to take care of them.” Complaint 1ffl27A, 27D, App. A-43.
More specifically, respondents claim that, “while serving Caterpillar as managers or weekly salaried employees, [they] were assured that if the San Leandro facility of Caterpillar ever closed, Caterpillar would provide employment opportunities for [them] at other facilities of Caterpillar, its subsidiaries, divisions, or related companies.”
Id.
¶27F, App. A-48.
Respondents maintain that these “promises were continually and repeatedly made,” and that they created “a total employment agreement wholly independent of the collective-bargaining agreement pertaining to hourly employees.”
Id.
¶29, App. A-49.
In reliance on these promises, respondents assert, they “continued to remain in Caterpillar’s employ rather than seeking other employment.”
Id.
¶ 31, App. A-49.
Between May 1980 and January 1984, Caterpillar downgraded respondents from managerial and weekly salaried positions to hourly positions covered by the collective-bargaining agreement. Respondents allege that, at the time they were downgraded to unionized positions, Caterpillar supervisors orally assured them that the downgrades were temporary.
Id.
¶ 27F, App. A-48. On December 15, 1983, Caterpillar notified respondents that its San Leandro plant would close and that they would be laid off.
On December 17, 1984, respondents filed an action based solely on state law in California state court, contending that Caterpillar “breached [its] employment agreement by notifying [respondents] that the San Leandro plant would be closed and subsequently advising [respondents] that they would be terminated” without regard to the individual employment contracts.
Id.
¶32, App. A-49.
Caterpillar then removed the action to federal court, arguing that removal was proper because any individual employment contracts made with respondents “were, as a matter of federal substantive labor law, merged into and superseded by the . . . collective bargaining agreements.” Petition for Removal, App. A-36. Respondents denied that they alleged any federal claim and immediately sought remand of the action to the state court. In an oral opinion, the District Court held that removal to federal court was proper, and dismissed the case when respondents refused to amend their complaint to attempt to state a claim under § 301 of the LMRA. App. A-4.
The Court of Appeals for the Ninth Circuit reversed, holding that the case was improperly removed. 786 F. 2d 928 (1986). The court determined that respondents’ state-law claims were not grounded, either directly or indirectly, upon rights or liabilities created by the collective-bargaining agreement. Caterpillar’s claim that its collective-bargaining agreement with the Union superseded and extinguished all previous individual employment contracts alleged by respondents was deemed irrelevant. The court labeled this argument a “defensive allegation,” “raised to defeat the [respondents’] claims grounded in those independent contracts.”
Id.,
at 936. Since respondents’ cause of action did not require interpretation or application of the collective-bargaining agree
ment, the court concluded that the complaint did not arise under § 301 and was not removable to federal court.
We granted certiorari, 479 U. S. 960 (1986), and now affirm.
II
A
The Court recently set forth in some detail “[t]he century-old jurisdictional framework governing removal of federal
question cases from state into federal courts,”
Metropolitan Life Insurance Co.
v.
Taylor,
481 U. S. 58, 63 (1987) (citing
Franchise Tax Board of Cal.
v.
Construction Laborers Vacation Trust for Southern Cal.,
463 U. S. 1 (1983)), and we sketch only its outline here.
Only state-court actions that originally could have been filed in federal court may be removed to federal court by the defendant.
Absent diversity of citizenship, federal-question jurisdiction is required.
The presence or absence of federal-question jurisdiction is governed by the “well-pleaded complaint rule,” which provides that federal jurisdiction exists only when a federal question is presented on the face of the plaintiff’s properly pleaded complaint. See
Gully
v.
First National Bank,
299 U. S. 109, 112-113 (1936). The rule makes the plaintiff the master of the claim; he or she may avoid federal jurisdiction by exclusive reliance on state law.
Ordinarily federal pre-emption is raised as a defense to the allegations in a plaintiff’s complaint. Before 1887, a federal defense such as pre-emption could provide a basis for removal, but, in that year, Congress amended the removal
statute. We interpret that amendment to authorize removal only where original federal jurisdiction exists. See Act of Mar.
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Justice Brennan
delivered the opinion of the Court.
The question for decision is whether respondents’ state-law complaint for breach of individual employment contracts is completely pre-empted by §301 of the Labor Management Relations Act, 1947 (LMRA), 61 Stat. 156, 29 U. S. C. § 185, and therefore removable to Federal District Court.
h-i
At various times between 1956 and 1968, Caterpillar Tractor Company (Caterpillar) hired respondents to work at its San Leandro, California, facility. Complaint ¶¶ 10-26, App. to Pet. for Cert. (App.) A-40 — A-42. Initially, each respondent filled a position covered by the collective-bargaining agreement between Caterpillar and Local Lodge No. 284, International Association of Machinists (Union). Each eventually became either a managerial or a weekly salaried employee, positions outside the coverage of the collective-bargaining agreement. Respondents held the latter positions for periods ranging from 3 to 15 years; all but two respondents served 8 years or more. App. A-97 — A-98.
Respondents allege that, “[djuring the course of [their] employment, as management or weekly salaried employees,” Caterpillar made oral and written representations that “they could look forward to indefinite and lasting employment with the corporation and that they could count on the corporation to take care of them.” Complaint 1ffl27A, 27D, App. A-43.
More specifically, respondents claim that, “while serving Caterpillar as managers or weekly salaried employees, [they] were assured that if the San Leandro facility of Caterpillar ever closed, Caterpillar would provide employment opportunities for [them] at other facilities of Caterpillar, its subsidiaries, divisions, or related companies.”
Id.
¶27F, App. A-48.
Respondents maintain that these “promises were continually and repeatedly made,” and that they created “a total employment agreement wholly independent of the collective-bargaining agreement pertaining to hourly employees.”
Id.
¶29, App. A-49.
In reliance on these promises, respondents assert, they “continued to remain in Caterpillar’s employ rather than seeking other employment.”
Id.
¶ 31, App. A-49.
Between May 1980 and January 1984, Caterpillar downgraded respondents from managerial and weekly salaried positions to hourly positions covered by the collective-bargaining agreement. Respondents allege that, at the time they were downgraded to unionized positions, Caterpillar supervisors orally assured them that the downgrades were temporary.
Id.
¶ 27F, App. A-48. On December 15, 1983, Caterpillar notified respondents that its San Leandro plant would close and that they would be laid off.
On December 17, 1984, respondents filed an action based solely on state law in California state court, contending that Caterpillar “breached [its] employment agreement by notifying [respondents] that the San Leandro plant would be closed and subsequently advising [respondents] that they would be terminated” without regard to the individual employment contracts.
Id.
¶32, App. A-49.
Caterpillar then removed the action to federal court, arguing that removal was proper because any individual employment contracts made with respondents “were, as a matter of federal substantive labor law, merged into and superseded by the . . . collective bargaining agreements.” Petition for Removal, App. A-36. Respondents denied that they alleged any federal claim and immediately sought remand of the action to the state court. In an oral opinion, the District Court held that removal to federal court was proper, and dismissed the case when respondents refused to amend their complaint to attempt to state a claim under § 301 of the LMRA. App. A-4.
The Court of Appeals for the Ninth Circuit reversed, holding that the case was improperly removed. 786 F. 2d 928 (1986). The court determined that respondents’ state-law claims were not grounded, either directly or indirectly, upon rights or liabilities created by the collective-bargaining agreement. Caterpillar’s claim that its collective-bargaining agreement with the Union superseded and extinguished all previous individual employment contracts alleged by respondents was deemed irrelevant. The court labeled this argument a “defensive allegation,” “raised to defeat the [respondents’] claims grounded in those independent contracts.”
Id.,
at 936. Since respondents’ cause of action did not require interpretation or application of the collective-bargaining agree
ment, the court concluded that the complaint did not arise under § 301 and was not removable to federal court.
We granted certiorari, 479 U. S. 960 (1986), and now affirm.
II
A
The Court recently set forth in some detail “[t]he century-old jurisdictional framework governing removal of federal
question cases from state into federal courts,”
Metropolitan Life Insurance Co.
v.
Taylor,
481 U. S. 58, 63 (1987) (citing
Franchise Tax Board of Cal.
v.
Construction Laborers Vacation Trust for Southern Cal.,
463 U. S. 1 (1983)), and we sketch only its outline here.
Only state-court actions that originally could have been filed in federal court may be removed to federal court by the defendant.
Absent diversity of citizenship, federal-question jurisdiction is required.
The presence or absence of federal-question jurisdiction is governed by the “well-pleaded complaint rule,” which provides that federal jurisdiction exists only when a federal question is presented on the face of the plaintiff’s properly pleaded complaint. See
Gully
v.
First National Bank,
299 U. S. 109, 112-113 (1936). The rule makes the plaintiff the master of the claim; he or she may avoid federal jurisdiction by exclusive reliance on state law.
Ordinarily federal pre-emption is raised as a defense to the allegations in a plaintiff’s complaint. Before 1887, a federal defense such as pre-emption could provide a basis for removal, but, in that year, Congress amended the removal
statute. We interpret that amendment to authorize removal only where original federal jurisdiction exists. See Act of Mar. 3, 1887, ch. 373, 24 Stat. 552, as amended by Act of Aug. 13, 1888, ch. 866, 25 Stat. 433. Thus, it is now settled law that a case may
not
be removed to federal court on the basis of a federal defense, including the defense of preemption, even if the defense is anticipated in the plaintiff’s complaint, and even if both parties concede that the federal defense is the only question truly at issue. See
Franchise Tax Board,
463 U. S., at 12.
There does exist, however, an “independent corollary” to the well-pleaded complaint rule,
id.,
at 22, known as the “complete pre-emption” doctrine. On occasion, the Court has concluded that the pre-emptive force of a statute is so “extraordinary” that it “converts an ordinary state common-law complaint into one stating a federal claim for purposes of the well-pleaded complaint rule.”
Metropolitan Life Insurance Co., supra,
at 65.
Once an area of state law has been completely pre-empted, any claim purportedly based on that pre-empted state law is considered, from its inception, a federal claim, and therefore arises under federal law. See
Franchise Tax Board, supra,
at 24 (“[I]f a federal cause of action completely pre-empts a state cause of action any complaint that comes within the scope of the federal cause of action necessarily ‘arises under’ federal law”).
The complete pre-emption corollary to the well-pleaded complaint rule is applied primarily in cases raising claims preempted by § 301 of the LMRA. Section 301 provides:
“Suits for violation of contracts between an employer and a labor organization representing employees in an industry affecting commerce as defined in this chapter, or between any such labor organizations, may be brought in any district court of the United States having jurisdiction of the parties, without respect of the amount in controversy or without regard to the citizenship of the parties.” 29 U. S. C. § 185(a).
In
Avco Corp.
v.
Machinists,
the Court of Appeals decided that “[s]tate law does not exist as an independent source of private rights to enforce collective bargaining contracts.” 376 F. 2d 337, 340 (CA6 1967), aff’d, 390 U. S. 557 (1968). In affirming, we held that, when “[t]he heart of the [state-law] complaint [is] a . . . clause in the collective bargaining agreement,”
id.,
at 558, that complaint arises under federal law:
“[T]he pre-emptive force of § 301 is so powerful as to displace entirely any state cause of action ‘for violation of contracts between an employer and a labor organization.’ Any such suit is purely a creature of federal law, notwithstanding the fact that state law would provide a cause of action in the absence of § 301.”
Franchise Tax Board, supra,
at 23.
B
Caterpillar asserts that respondents’ state-law contract claims are in reality completely pre-empted §301 claims, which therefore arise under federal law. We disagree. Section 301 governs claims founded directly on rights created by collective-bargaining agreements, and also claims “substantially dependent on analysis of a collective-bargaining agreement.”
Electrical Workers
v.
Hechler,
481 U. S. 851, 859, n. 3 (1987); see also
Allis-Chalmers Corp.
v.
Lueck,
471 U. S. 202, 220 (1985). Respondents allege that Caterpillar has entered into and breached
individual
employment contracts with them. Section 301 says nothing about the content or validity of individual employment contracts. It is
true that respondents, bargaining unit members at the time of the plant closing, possessed substantial rights under the collective agreement, and could have brought suit under § 301. As masters of the complaint, however, they chose not to do so.
Moreover, contrary to Caterpillar’s assertion, see Reply Brief for Petitioner 10, respondents’ complaint is not substantially dependent upon interpretation of the collective-bargaining agreement. It does not rely upon the collective agreement indirectly, nor does it address the relationship between the individual contracts and the collective agreement.
As the Court has stated, “it would be inconsistent with congressional intent under [§301] to pre-empt state rules that proscribe conduct, or establish rights and obligations, independent of a labor contract.”
Allis-Chalmers Corp., supra,
at 212.
Caterpillar next relies on this Court’s decision in
J. I. Case Co.
v.
NLRB,
321 U. S. 332 (1944), arguing that when respondents returned to the collective-bargaining unit, their
individual employment agreements were subsumed into, or eliminated by, the collective-bargaining agreement. Thus, Caterpillar contends, respondents’ claims under their individual contracts actually
are
claims under the collective agreement and pre-empted by § 301.
Caterpillar is mistaken. First,
J. I. Case
does not stand for the proposition that all individual employment contracts are subsumed into, or eliminated by, the collective-bargaining agreement. In fact, the Court there held:
“Individual contracts cannot subtract from collective ones, and whether under some circumstances they may add to them in matters covered by the collective bargain, we leave to be determined by appropriate forums under the law of contracts applicable, and to the Labor Board if they constitute unfair labor practices.” 321 U. S., at 339.
Thus, individual employment contracts are not inevitably superseded by any subsequent collective agreement covering an individual employee, and claims based upon them may arise under state law. Caterpillar’s basic error is its failure to recognize that a plaintiff covered by a collective-bargaining agreement is permitted to assert legal rights
independent
of that agreement, including state-law contract rights, so long as the contract relied upon is
not
a collective-bargaining agreement. See
Allis-Chalmers Corp., supra.
Caterpillar im-
permissibly attempts to create the prerequisites to removal by ignoring the set of facts
(i.
e., the individual employment contracts) presented by respondents, along with their legal characterization of those facts, and arguing that there are different facts respondents might have alleged that would have constituted a federal claim. In sum, Caterpillar does not seek to point out that the contract relied upon by respondents is in fact a collective agreement; rather it attempts to justify removal on the basis of facts not alleged in the complaint. The “artful pleading” doctrine cannot be invoked in such circumstances.
Second, if an employer wishes to dispute the continued legality or viability of a pre-existing individual employment contract because an employee has taken a position covered by a collective agreement, it may raise this question in state court. The employer may argue that the individual employment contract has been pre-empted due to the principle of exclusive representation in § 9(a) of the National Labor Relations Act (NLRA), 29 U. S. C. § 159(a). See
Machinists
v.
Wisconsin Employment Relations Comm’n,
427 U. S. 132, 146 (1976) (quoting
Teamsters
v. Morton, 377 U. S. 252, 260 (1964)) (NLRA pre-empts state law that “ ‘upset[s] the balance of power between labor and management expressed in our national labor policy’”). Or the employer may contend that enforcement of the individual employment contract arguably would constitute an unfair labor practice under the NLRA, and is therefore pre-empted. See
San Diego Build
ing Trades Council
v.
Garmon,
359 U. S. 236 (1959) (state law that infringes upon the National Labor Relations Board’s primary jurisdiction over unfair labor practice charges is preempted). The fact that a defendant might ultimately prove that a plaintiff’s claims are pre-empted under the NLRA does not establish that they are removable to federal court.
Finally, Caterpillar argues that § 301 pre-empts a state-law claim even when the employer raises only a defense that requires a court to interpret or apply a collective-bargaining agreement. Caterpillar asserts such a defense claiming that, in its collective-bargaining agreement, its unionized employees waived any pre-existing individual employment contract rights.
It is true that when a defense to a state claim is based on the terms of a collective-bargaining agreement, the state court will have to interpret that agreement to decide whether the state claim survives. But the presence of a federal question, even a § 301 question, in a defensive argument does not overcome the paramount policies embodied in the well-pleaded complaint rule — that the plaintiff is the master of the
complaint, that a federal question must appear on the face of the complaint, and that the plaintiff may, by eschewing claims based on federal law, choose to have the cause heard in state court. When a plaintiff invokes a right created by a collective-bargaining agreement, the plaintiff has
chosen
to plead what we have held must be regarded as a federal claim, and removal is at the defendant’s option. But a
defendant
cannot, merely by injecting a federal question into an action that asserts what is plainly a state-law claim, transform the action into one arising under federal law, thereby selecting the forum in which the claim shall be litigated.
If a defendant could do so, the plaintiff would be master of nothing. Congress has long since decided that federal defenses do not provide a basis for removal. See
supra,
at 392, and n. 5, 392-393.
III
Respondents’ claims do not arise under federal law and therefore may not be removed to federal court. The judgment of the Court of Appeals is
Affirmed.