*843 Opinion
We are asked to determine whether California may impose a tax on gross premiums collected by foreign insurers who solicit business in California by mail from outside the state, and who utilize independent contractors in California to perform functions incident to the acceptance of applications and the administration of claims. The significant element in making this determination is whether the contacts between the insurers and the state justify imposition of the tax under the due process clause of the Fourteenth Amendment to the United States Constitution.
Plaintiffs, Illinois Commercial Men’s Association (IC) and National Liberty Life Insurance Company (NL) are organized in other states and each has its principal place of business in the state in which it is incorporated. Both companies sold accident, health, and life insurance policies in California by advertising in national publications and by direct mail solicitation of prospective customers. NL advertised in local publications as well. Neither plaintiff owned or leased property in California or employed agents or representatives to solicit business in this state. However, independent contractors acting on their behalf did perform certain acts in California in connection with the administration of claims and other matters. These activities will be described in detail below.
In 1965, the State of California for the first time made the assertion that unlicensed foreign insurers were subject to regulation by the state. NL obtained a certificate and license from the Department of Insurance (department) in August 1968. IC has never sought a license or certificate from the department, and has ceased to solicit business in California.
In May 1968, the department notified plaintiffs of its intention to assert their liability for the payment of a gross premium tax for the years 1963 through 1967, pursuant to article XIII, section 14-% of the California Constitution (now § 28), and Revenue and Taxation Code section 12201. These measures impose an annual tax on insurers “doing business in this state.” Prior to this time, the state had not attempted to assess against plaintiffs a tax attributable to premiums received for direct mail insurance sold to California residents. The State Board of Equalization (board) assessed gross premium taxes of $23,504.54 against IC for the years 1963 through 1967, and $47,747.50 against NL for the years 1963 through 1965. Plaintiffs paid the tax and filed claims for refund pursuant to sections 12978 and 12979 of the Revenue and Taxation Code. 1 The claims were denied, and these actions *844 against the board seeking refunds followed. The trial court found in the board’s favor, holding that the tax was justified in part on the ground that plaintiffs received a benefit from California by virtue of health and police services provided to their insureds. These services promoted the well-being of the insureds, reasoned the trial court, thereby improving “the odds on which the plaintiff insurers are gambling” by their issuance of policies to California residents. Plaintiffs appeal from the ensuing judgment. 2
The United States Supreme Court has considered the circumstances under which a state may, within the limits of the due process clause, impose a tax on a foreign corporation that conducts its business by mail from outside the taxing state. Generally speaking, the taxing state must have a substantial interest in the transactions in order to justify imposition of the tax. This interest is measured by the extent and nature of the contacts between the state and the foreign corporation (such as the presence of agents of the corporation within the state), and the benefits conferred on the corporation by the state.
(Nat. Bellas Hess
v.
Dept. of Revenue
(1967)
Before discussing in detail the standards which allow a state to tax a foreign corporation and their application to the conduct of plaintiffs’ business in California, we consider the board’s claim that two cases, one decided by this court and one by the United States Supreme Court, have settled the question at issue. The board asserts that
People
v.
United National Life Insurance Company
(1967)
In United National, after an exhaustive discussion of the history of state regulation and taxation of foreign insurers under the due process and the commerce clauses, we held unanimously that three mail order insurers (one of them NL), which solicited and negotiated insurance transactions with *845 California residents exclusively by mail from offices located outside the state, could constitutionally be regulated by California. 3
The board insists that this holding applies not only to state regulation of foreign insurers, but also to taxation of such entities. Plaintiffs claim, on the other hand, that contacts between a state and a foreign insurer which would justify regulation or the service of process would not be sufficient to warrant taxation (citing
Jeter
v.
Austin Trailer Equipment Co.
(1953)
The board counters with the United States Supreme Court’s opinion in
Conn. General Co.
v.
Johnson, supra,
*846
We confess some doubt as to the meaning of the language quoted, but we cannot accept the correctness of the board’s claim that the power to regulate a foreign insurer is always determinative of the power to tax it. The United States Supreme Court has applied substantially the same test to determine the validity under the due process clause of a tax on a foreign corporation both before and after its decision in
Connecticut General.
The relationship between the state and the insurer has been examined to determine whether there is ‘“some definite link, some minimum connection, between a state and the person, property or transaction [the state] seeks to tax’ ” and whether the state has “ ‘given anything for which it can ask return.’”
(National Bellas,
Although the formulation of the test has varied to some degree, its substance has remained essentially the same in numerous decisions of the high court. (E.g.,
Moorman Mfg. Co.
v.
Bair
(1978)
Plaintiffs rely heavily on
National Bellas, supra,
The high court, after stating the applicable test as set out above, held that imposition of the tax violated both the due process and the commerce clauses because a state may not impose a tax “upon a seller whose only connection with customers in the State is by common carrier or the United States mail.” (
The board claims that
National Bellas
is distinguishable because it held the tax invalid under both the due process and commerce clauses, and because it involved a retailer rather than an insurer. The state has a special interest in insurance matters in view of the nature of insurance and the continuing relationship between the insurer and the state’s residents; therefore, claims the board, the standards for state taxation of an insurer are more liberal than those applicable to a retailer. However, the opinion in
National Bellas
considered separately the requirements of the due process and commerce clauses, states that the standards under both provisions are similar, and holds that these provisions were violated by the Illinois tax. Moreover, while it is true that the states have a special interest in the business of insurance, and that interest justifies regulation of an insurer which has lesser contacts with the regulating state than other types of businesses, we do not agree that this enhanced interest also justifies taxation of a foreign insurer under standards less stringent than those applicable to other enterprises. In fact, as we have seen, the United States Supreme Court applies substantially the same standards to insurers as to other businesses in determining whether a state has the right under the due process clause to tax a foreign corporation. (See, e.g.,
State Bd. of Ins.
v.
Todd Shipyards, supra,
Thus, we cannot avoid an examination of the relationship between plaintiffs and California to determine whether the tax was justified under the standards set forth above.
*848 The stipulated facts establish the following:
A person interested in purchasing an insurance policy would submit his application by mail to the plaintiffs’ home office in another state. If the application was accepted, a contract was formed in the plaintiffs’ home state, and a policy was mailed to the applicant. 5 Premiums were paid by mail.
In almost all cases, IC processed applications without investigation, although on an average of five or six times a year, it would request an independent contractor in California to confirm information set forth in an application.
IC sent 648,175 mail solicitations into the state between 1963 and 1965. It issued more than 105,000 policies in California, and approximately 3,318 claims were filed between 1963 and 1967 by California policyholders. When an insured made a claim, IC’s practice was to send a form to be completed by the claimant and his physician. Most claims were processed on the basis of these forms, but approximately 10 percent would not be processed until IC received confirming information from independent contractors in California, who collected information from doctors, hospital personnel, or police, and sometimes from the claimant, his family, or his representative.
Ordinarily, IC would pay a claim upon receipt of this additional information, but in certain difficult cases, it would ask another independent contractor in California to obtain confirming data. This contractor had authority to settle claims on behalf of IC. Between 1965 and 1968, 124 California claims were handled in this manner. Two claims resulted in lawsuits in California between 1963 and 1967. IC was represented by California attorneys in the litigation; both suits were ultimately settled.
NL generally processed applications without investigation. It had 885 life insurance policyholders in California between 1963 and 1965, and 38,167 accident and health policyholders. In that period, 7,745 claims were filed by California residents. During the processing of these claims, NL would on occasion request Retail Credit Company in Pennsylvania, an independent organization, to contact its California office to collect necessary data by interviewing doctors, hospital personnel, police, and other persons, and by obtaining copies of documents, such as the reports of doctors and police. *849 Between 1963 and 1965, it utilized Retail Credit Company to collect information in connection with 2 percent of the claims filed. Retail used 175 representatives to conduct about 153 investigations in California on behalf of NL, which paid approximately $3,785 for these services. This amount represented less than one-third of 1 percent of the premiums collected by NL. Retail was not authorized to offer or make settlements on behalf of NL.
Plaintiffs claim that, like the retailer in National Bellas, they have no employees or property in California, and their activities in this state amount substantially to communication with customers by mail. They assert that the application, verification, and claims procedures described above were minimal and sporadic, and were insufficient to justify imposition of the tax. We disagree.
We observe, first, the fact that a foreign corporation performs acts in the taxing state through persons it designates as independent contractors is not determinative of whether the nexus required for taxation is present. In
Scripto
v.
Carson, supra, 362
U.S. 207, the high court considered the imposition of a tax on a foreign corporation by Florida. The corporation had entered into contracts with 10 salesmen who lived in Florida and who solicited orders for the products manufactured by the corporation. They forwarded these orders to the corporation’s home office out of the state. The contracts designated each salesman as an “independent contractor.” The corporation had no offices or property within Florida. Nevertheless, this arrangement provided a sufficient nexus to justify the tax. The labelling of the salesmen as “independent” was not controlling, it was held, because it would “open the gates to a stampede of tax avoidance” if such a formal contractual designation were allowed to make a constitutional difference. (
In the present case likewise, the circumstance that investigation and/or settlement services on behalf of plaintiffs in California were performed by independent contractors is of little constitutional significance. The undeniable fact is that they were acting as agents of plaintiffs. Although plaintiffs assert a distinction between the present case and Scripto because the salesmen in Scripto solicited business for the foreign corporation, whereas here plaintiffs’ agents did not perform that function, we are unimpressed by such distinction. What is significant in the present context is that the investigation and settlement of claims is an integral and crucial aspect of the business of insurance. Either or both of these functions were performed with respect to California policyholders by agents of plaintiffs residing in this state.
*850
The utilization by NL of 175 representatives to conduct 153 investigations in California in a 2-year period, and the investigation of 331 claims by IC’s agents, who had authority to settle a substantial portion of such claims, cannot be viewed, as plaintiffs urge, as conduct so “sporadic,” and “peripheral” to their business that it amounts only to the “slightest presence” by them in California for purposes of taxation.
(National Geographic
v.
Cal. Equalization Bd.
(1977)
That plaintiffs’ agents, whose offices were in California, received the protection of this state’s laws can hardly be doubted. In
Scripto,
the “benefit” aspect of the constitutional test was not discussed, apparently on the assumption that a foreign corporation which has agents in the taxing state also receives the protection of that state’s laws. And in
Standard Steel Co.
v.
Wash. Revenue Dept., supra,
We hold, therefore, that the character and extent of plaintiffs’ activities in this state were sufficient to form the “definite link” and “minimum connection” required to justify imposition of the tax, and that plaintiffs received the benefit of this state’s laws through the protections afforded to their agents in California.
Our conclusion is supported by decisions from other jurisdictions. In three cases, the power of a state to tax mail order insurers was upheld even though the activities of the insurers in the taxing state were similar to or less ex
*851
tensive than those of plaintiffs. In
Ministers Life and Casualty Union
v.
Haase
(1966)
Armed Forces Co-op etc.
v.
Dept. of Ins.
(Wyo. 1980)
While the foregoing cases related to the power of the state to both regulate and tax a foreign insurer, we do not deem this circumstance significant. It should also be noted that the United States Supreme Court dismissed appeals for want of a substantial federal question in
Ministers
(
The parties cite numerous other cases in addition to those discussed above in support of their positions, but the facts are so clearly distinguishable from the present circumstances that it would serve no useful purpose to discuss them in detail. (E.g.,
Authority to tax foreign corporation
denied:
Norton Co.
v.
Dept. of Revenue
(1951)
Our conclusion that the contacts between plaintiffs and California are sufficient to justify imposition of the tax are also important to the resolution of two additional contentions made by plaintiffs.
First, they argue, they were not “doing business” in California within the meaning of article XIII, section 28, subdivision (b), of the California Constitution which, as we have seen, provides for a tax on insurers “doing business” in this state. They rely on three cases for the proposition that the state in which administrative functions in connection with insurance policies are performed is of “great significance” in evaluating whether a foreign corporation is “doing business” in California.
(Occidental L. Ins. Co.
v.
State Bd. Equal.
(1956)
Next, plaintiffs urge, the tax is invalid as a violation of due process and equal protection because it is measured by the total premiums collected from California policyholders, and therefore reaches “profits which are in no just sense attributable to transactions” within this state. (See
Hans Rees’ Sons
v.
No. Carolina
(1931)
A number of cases have held that a tax based on the total sales made within a state is not invalid even though some activities (including major functions such as the manufacture of the product) occurred in other jurisdictions.
Standard Steel Co.
v.
Washington Revenue Department, supra,
In
Moorman Mfg. Co.
v.
Bair, supra,
*854
Finally, in
Equitable Life Assurance Society
v.
Pennsylvania
(1915)
While these cases are distinguishable on their facts, they state principles which are applicable to the tax under consideration here: an unapportioned tax measured by the total sales of a foreign corporation within a state may be valid even though major functions which contributed to the value of the taxed product, such as its manufacture, occur outside the taxing state; the importance of the foreign corporation’s activity in the taxing state to the “realization and continuance” of the corporation’s business therein is a significant factor in evaluating the contacts between the state and the corporation; and the taxpayer challenging the failure to make an apportionment has the burden of showing by “clear and cogent” evidence that the tax is out of all proportion to the business transacted in the state and leads to “grossly disproportionate results.”
Plaintiffs have not made such a showing here. Their agents in California conducted on their behalf a substantial number of investigations of claims made by California policyholders. Although the number of these investigations was not overwhelming in comparison with the over-all number of claims filed by this state’s residents—most claims could be processed without local investigation—whenever such investigations were required because telephone or mail inquiries were inadequate to resolve plaintiffs’ questions regarding the claims, they were conducted by plaintiffs’ agents in California. Indeed, IC’s agents had the power to conclude settlements on its behalf. Moreover, as we have observed, the investigation of claims is an important and integral part of the business of insurance; the conduct of plaintiffs’ agents was critical to the “realization and continuance” of the business conducted by plaintiffs in this state. We conclude, therefore, that plaintiffs did not show by “clear and cogent” evidence that the unapportioned tax on the premiums of California policyholders is out of all propor *855 tion to the conduct of their business in this state, so as to lead to “grossly disproportionate results. ” 9
Plaintiffs’ final argument is that the state should be estopped to impose the tax retroactively. They claim that they justifiably relied on the general understanding in the legal community and the insurance industry prior to 1968—when the state first sought to impose the tax in issue—that mail order insurers were not subject to a tax on premiums, 10 and that affirmative representations to that effect were made to them by a California official. They urge that it would be unjust to allow the state to levy a tax upon them retroactively in view of such reliance, particularly because they are unable to recoup the tax from the insureds.
U.S. Fid. & Guar. Co.
v.
State Bd. of Equal.
(1956)
The “clear representation” relied on by plaintiffs is contained in a letter written in 1961 by an official in the compliance and legal division of the department stating, “[t]he laws of this State do not, and it is our understanding that they could not constitutionally regulate the transaction of insurance through the United States mail.”
*856 The letter was written to an individual in NT’s home state who acted as a consultant to the president of NL, and there is no indication that IC was aware of its content. IC’s reliance argument, therefore, is based largely on the state’s omission to collect the tax and assumptions made by a national organization and others that the tax would be invalid if it were imposed. Obviously, these matters are insufficient to constitute justifiable reliance.
NL’s claim that the 1961 letter provides a basis for such reliance is unconvincing. The letter does not refer to state taxation of mail order insurers, but to their regulation, and NL could not properly have relied on the statements made therein as referring to taxation. The basis of NL’s claim to the contrary is its premise that a state which does not have the power to regulate a mail order insurer a fortiori does not have the power to tax it, since a higher level of contacts is required for taxation than for regulation. Thus, it is argued, the statement in the letter referring to regulation also amounted to a representation relating to taxation.
Assuming, without deciding, the validity of NL’s premise that a state without power to regulate also cannot tax, there is no indication in the letter that the official who wrote it made the representation upon that assumption. In any event, NL could not have justifiably relied upon any such representation. The letter was written not by an official of the board which is the agency authorized to assess the tax (Rev. & Tax. Code, § 12412), but by an official of the department. 11 NL never sought a ruling or made any inquiry of the board regarding the state’s position on taxation of mail order insurers. Moreover, the letter refers only to an “understanding” of state law with respect to regulation, and cannot reasonably be interpreted as a definitive ruling on the question of taxation. Under all the circumstances, we hold that NL failed to establish that it justifiably relied on a statement by a public official that the premiums received from California residents were not subject to taxation. 12 It is hardly necessary to observe that this is not the “unusual case” in which justification for the estoppel is “clear and the injustice great.”
*857
The authorities cited by plaintiffs in support of their claim of estoppel are not persuasive. For the most part they involved attempts to retroactively impose a tax following amendment of a statute
(Equitable Life Assur. Soc.
v.
Thulemeyer
(1935)
The judgment is affirmed.
Bird, C. J., Richardson, J., Kaus, J., Broussard, J., Reynoso, J., and Grodin, J., concurred.
Notes
Section 12978 sets forth time limitations on claims for refunds, and section 12979 provides that claims shall be in writing and state the specific grounds upon which they are founded.
Although two separate actions are involved, the issues are similar as to both plaintiffs. Unless otherwise noted, the discussion which follows will be applicable to both.
United National
points out (
The full paragraph in which the statement appears is as follows: “But the limits of the state’s legislative jurisdiction to tax, prescribed by the Fourteenth Amendment, are to be ascertained by reference to the incidence of the tax upon its objects rather than the ultimate thrust of the economic benefits and burdens of transactions within the state. As a matter of convenience and certainty, and to secure a practically just operation of the constitutional prohibition, we look to the state power to control the objects of the tax as marking the boundaries of the power to lay it. Hence it is that a state which controls the property and activities within its boundaries of a foreign corporation admitted to do business there may tax them. But the due process clause denies to the state power to tax or regulate the corporation’s property and activities elsewhere.” (At pp. 80-81 [
NL also conducted solicitations by sending a policy to a prospective customer which could be accepted in California by executing a “validating certificate” and mailing it to the company.
The board argues that, as the trial court held, plaintiffs received the benefit of California’s health, police and court systems, since these protections and services had the effect of diminishing the claims made against plaintiffs on the policies sold to Californians. Plaintiffs counter that these benefits did not accrue to them because they took such services into account in setting insurance rates. Therefore, they assert, it is the California insureds rather than plaintiffs who gained from the benefits and services provided by the state. We need not resolve this debate in view of the conclusion we reach.
In Alliance, the insurer had ceased soliciting business in California and did not renew its certificate of authority to conduct business in this state, nor did it write any new policies. It did, however, continue to collect renewal premiums from California residents on policies effective before it surrendered its license. These premiums were mailed to Illinois. The state’s attempt to tax these renewal premiums was held invalid on the ground that the insurer was no longer “doing business” in California.
The tax in Moorman was not based on gross sales made in Iowa, but it was unapportioned in the sense that it was measured by the proportion which the sales made within the state bore to the gross sales of the taxpayer. Since the formula did not take into consideration the fact that some of the amounts realized from the Iowa sales may have been attributable to the state in which the goods were manufactured, the tax was “unapportioned” in the respect we discuss here.
National Liberty Life Ins. Co.
v.
State, supra,
Plaintiffs rely, for example, on a report of the National Association of Insurance Commissioners in 1968 that direct mail insurers “have ample reason to suppose” that they are not subject to taxation. (See also Hanson & Obenberger, Mail Order Insurers (1966) 50 Marq.L.Rev. 175.)
We recognize, of course, that the Insurance Commissioner performs some duties with regard to the tax, such as forwarding the tax returns of the insurer to the board (Rev. & Tax. Code, § 12411), auditing the return (§ 12421), and proposing deficiency assessments to the board when appropriate (§ 12422).
In
United National, supra,
Pacific Southwest Airlines
v.
State Board of Equalization
(1977)
Plaintiffs also rely on the recent decision of the United States Supreme Court in
Arizona
v.
Norris
(1983) — U.S. — [
