What makes a water's edge election valid when the return and the election disagree?

How the election is supposed to be made

The clean case is mechanical. Every member of the self-assessed combined reporting group that is subject to California tax elects, on a timely filed original return for the first water's edge year, by filing the water's edge return form, Form 100W, with the election form, Form 100-WE, attached, and by computing the tax on a water's edge basis (Cal. Code Regs., tit. 18, section 25113(c)(1), (c)(3)). The election is a single group-level act executed member by member, and once made it remains in effect until terminated (Rev. and Tax. Code section 25113(c)(12)). Termination without Franchise Tax Board consent becomes available only after the election has been in effect for at least eighty-four months, and it must then be made on an original, timely filed return by every taxpayer that is a member of the water's edge group (section 25113(c)(9)); terminating any earlier requires Franchise Tax Board consent (section 25113(c)(10)). The eighty-four months are a minimum commitment period, in other words, not an expiration date. What follows a termination is a bar rather than a consent regime: except for the deemed elections described in section 25113(c)(2), (4) and (5), where an election has been terminated under paragraph (9) or paragraph (10), another water's edge election may not be made for any taxable year beginning within the eighty-four month period following the last day of the terminated election period, unless the Franchise Tax Board waives that prohibition for good cause (section 25113(c)(11)). The commitment period, and what happens to it when electing groups merge, reorganize, or acquire nonelecting members, is its own subject, covered in the companion article on the water's edge election and reorganizations; this article is about whether an election came into existence at all, and what happens in a later year when the return stops matching it.

Mismatch one: the form is there, the computation is not

The first failure pattern is the group that attaches Form 100-WE to a timely original return and then, through preparer error, a software configuration, or a late change of heart imperfectly executed, computes the tax on a worldwide combined basis. The election is invalid in this pattern, and the result rests on the statute's text rather than on agency practice: section 25113(a) provides that the election will be considered valid if both of its conditions are met, and the first is that the tax is computed in a manner consistent with a water's edge election. A worldwide computation is the opposite of that. The stakes can be large in one direction or the other, because the group either wanted the election, and now faces worldwide combination for years it planned around water's edge, or regrets it, and would welcome the invalidity result.

Not every computational error defeats the election. The statute measures the group by the combined report as filed, taking into account the effects of a purported water's edge election, whether or not the membership of the corporations in that combined report was correctly determined (Rev. and Tax. Code section 25113(d)(3)). The Franchise Tax Board's Water's-Edge Manual directs its auditors to evaluate all of the facts and circumstances to determine whether the taxpayer was attempting to compute its California tax consistently with a water's edge election, or whether the filing was based on some other theory, and it treats an attached Form 100-WE as a valid election unless the election was not made on an original timely filed return or the inconsistent filings are material enough to cause the group to fail what the manual calls the substantial performance test (FTB Water's-Edge Manual, sections 3.1(f) and 3.1(j)(3)). The manual's example of a return that fails is one that excluded some foreign affiliates, included others, and disregarded water's edge provisions such as partial inclusion and the foreign dividend deduction (FTB Water's-Edge Manual, section 3.1(f)). A single omitted partial-inclusion computation, in other words, is a materiality question; a worldwide combined report with a Form 100-WE stapled to it is not.

The regulation's objective evidence rule does not reach this pattern, because it substitutes only for the notification requirement, the Form 100W filing with Form 100-WE attached (Cal. Code Regs., tit. 18, section 25113(c)(3)(B), (c)(3)(C)); the statute likewise allows objective evidence only in lieu of notification on the designated form (Rev. and Tax. Code section 25113(a)). What the regulation does provide is timing relief, in two forms. First, a complete return filed on or before the extended due date is itself the original return, because the regulation defines the original return as the last return filed on or before the due date, taking extensions into account, regardless of the form on which it is filed, and its examples treat a second, timely return that makes the election as a valid election (Cal. Code Regs., tit. 18, section 25113(b)(2) and (c)(4), Example 1). Second, timely filings that supplement a previously filed return, or correct mathematical or other errors, are treated as the original return if they contain objective evidence that a water's edge election was intended (Cal. Code Regs., tit. 18, section 25113(c)(4)(B)). A group that catches the computational error inside its filing window, extension included, and files a corrected water's edge computation has made its election on the original return. A group that discovers the mismatch after the extended due date, on audit or otherwise, has no regulatory cure: the objective evidence rule does not reach the computation, a return computed on a worldwide basis does not satisfy the statute, and the election fails in whichever direction the revenue runs.

Mismatch two: the computation is there, the form is not

The mirror image is the group that files Form 100W and computes everything on a water's edge basis but fails to make the election in form, a missing Form 100-WE, a member that never signed, an attachment dropped in assembly. Here the rules are more forgiving than the folklore suggests, in two distinct ways. First, the form itself is the standard manner but not the only one. The Franchise Tax Board may accept other objective evidence of the election, and the regulation names statements attached to the return and substantially completed water's edge forms (Cal. Code Regs., tit. 18, section 25113(c)(3)(C)). The Franchise Tax Board's manual goes a step further and lists filing on Form 100W itself as objective evidence of the election (FTB Water's-Edge Manual, section 3.1(f)), although acceptance of evidence other than Form 100-WE rests with the Franchise Tax Board (Rev. and Tax. Code section 25113(a)(2)). The limit on this path is where the evidence sits: the manual treats objective evidence as evidence included with the original timely filed return for the year of the election, and actions taken by the taxpayer after the original return has been filed cannot be considered objective evidence of the taxpayer's intent on that return (FTB Water's-Edge Manual, section 3.1(f)). Board minutes, election workpapers, and preparer correspondence kept in a file are not evidence on the return.

Second, the deemed election rules pick up group members who never elected on their own. A taxpayer whose income and apportionment factors are reflected in the self-assessed combined reporting group on the timely filed original return of an electing parent corporation, meaning a corporation holding more than fifty percent of its voting power, is deemed to have elected (Rev. and Tax. Code section 25113(b)(2)(A), (b)(3)). A taxpayer whose income and apportionment factors are reflected in the combined report on an electing taxpayer's timely filed original return is also deemed to have elected where the election notification was signed by an officer or authorized agent of its parent corporation or of another corporation with authority to bind it (section 25113(b)(2)(B)). The effect of these rules is that a group-wide election does not fail because one subsidiary's paperwork did.

The deemed election rules also decide the member-level conflict that is more common than a missing signature: the subsidiary that files its own separate return on a worldwide basis while the parent elects. A member's own contrary return does not necessarily defeat the group's election. A subsidiary that files a separate worldwide return is still deemed to have elected where its electing parent included its income and apportionment factors in the parent's timely filed original return (Rev. and Tax. Code section 25113(b)(2)(A); Cal. Code Regs., tit. 18, section 25113(c)(2)(A), Examples 1 and 4). Where no deemed election path applies, the regulation is categorical: no election will have been made if a taxpayer member of the combined reporting group files a separate return in which no election is made (Cal. Code Regs., tit. 18, section 25113(c)(2); Rev. and Tax. Code section 25113(b)(1)). The statute also governs the case where the Franchise Tax Board itself changes the group on audit. Where an audit determination places a nonelecting taxpayer in the electing taxpayers' combined reporting group, the nonelecting taxpayer is deemed to have elected unless the electing taxpayers' total business assets do not exceed its own, in which case the electing taxpayers' election terminates as of the date the nonelecting taxpayer is properly included (Rev. and Tax. Code section 25113(c)(5)). That rule is not a reorganization rule, and a group that is larger in revenue but smaller in business assets than the affiliate the audit adds can lose its election without ever having filed inconsistently.

What the forgiveness never reaches is the calendar. Every path to a valid election runs through a timely filed original return. A group that missed the filing deadline has no election for that year no matter what the return says (Cal. Code Regs., tit. 18, section 25113(b)(2), (c)(2)(A), Example 3), an amended return filed after the original cannot create an election the original did not make (FTB Water's-Edge Manual, section 3.1(d)(2)), and the practical consequence is that the water's edge decision must be final, executed, and internally consistent by the extended due date of the first year's return, or deferred to a later year.

The later-year mismatch

The mismatch can also arise in a year after the election year, in a group already filing under an election that files a worldwide return. Before eighty-four months have run, the election remains in effect until terminated, and an early termination requires Franchise Tax Board consent (Rev. and Tax. Code section 25113(c)(10), (c)(12)); a worldwide Form 100 filed in that window is an inconsistent return under a live election, not a termination. Once the election has been in effect for eighty-four months, the picture changes. A timely filed original return computed on a worldwide basis on Form 100 rather than Form 100W, filed by every member of the water's edge group, is evidence the Franchise Tax Board may accept as a termination (Cal. Code Regs., tit. 18, section 25113(d)(1)(B), (D)), and a terminated election cannot be made again for eighty-four months unless the Franchise Tax Board waives the prohibition for good cause (Rev. and Tax. Code section 25113(c)(11)). A group that files worldwide by accident after its commitment period has run may therefore find that it has terminated, and has locked itself out of re-electing for seven years, on the strength of a return it never meant as an election decision.

What follows an invalid election

An invalid election is tested year by year, and a filing position taken in previous years is not objective evidence that the taxpayer intended to make a new election in a subsequent year (FTB Water's-Edge Manual, section 3.1(f)). The Franchise Tax Board's stated procedure is to notify the taxpayer in writing as soon as possible once an election is found invalid, because, as the manual notes, an invalid election is often a multi-year problem, and to ask the taxpayer to file amended returns on a worldwide basis for the affected years (FTB Water's-Edge Manual, section 3.1(j)(4)). Where the taxpayer does not, the ordinary deficiency machinery applies. A notice of proposed assessment must generally be mailed within four years after the return was filed (Rev. and Tax. Code section 19057(a)), a written protest is due within sixty days after the notice is mailed (section 19041), and an appeal to the Office of Tax Appeals from the action on the protest is due within thirty days after the notice of action is mailed (section 19045). A group that paid worldwide tax and later concludes its election was valid, or paid water's edge tax and concludes it was not, is on the refund side of the same machinery: a claim for refund must be filed within four years from the date a timely return was filed, four years from the last day prescribed for filing the return without regard to extensions, or one year from the date of the overpayment, whichever period expires later (section 19306), and a refund suit lies only after the claim has been filed and denied, or deemed denied after six months without action, on the grounds set forth in the claim, with the suit subject to its own filing window measured from the denial (sections 19382, 19384 and 19385).

Practice notes

The failure patterns here are process failures, and the fixes are checklist items. The first is that the election package should be assembled and reviewed as a unit: Form 100W, Form 100-WE for each electing member or a common parent election covering them, and a computation that is water's edge from the combined report through the tax line, verified against each other before filing, because the two mismatch patterns above are both one unreviewed detail away from any first-year filing. The second is that the supplemental-filing window is the cheap cure: any inconsistency discovered before the extended due date should be corrected by a superseding filing while the correction can still be the original return. Any evidence of intent the group wants counted should be filed with the return itself, as a statement attached to the timely filed original return or as substantially completed water's edge forms (Cal. Code Regs., tit. 18, section 25113(c)(3)(C)). The Franchise Tax Board's Water's-Edge Manual treats objective evidence as evidence included with the original timely filed return and does not consider actions taken after that return is filed (FTB Water's-Edge Manual, section 3.1(f)). Board minutes, election workpapers, and preparer correspondence are worth keeping, but under that reading they do not stand in for an election missing from the return. The third is that a copy of the original election should be attached to every subsequent return filed during the election period (Cal. Code Regs., tit. 18, section 25113(c)(5)), which is also the record a group inheriting a return history, through acquisition or a preparer change, should look for before assuming the group's status; a member deemed elected through a parent's report, or an election resting on objective evidence rather than a clean form, is valid but worth documenting affirmatively before an audit asks. Where the Franchise Tax Board asserts invalidity of a form-plus-worldwide-computation filing, the questions are whether a timely superseding filing corrected the computation and, if the computation was water's edge in form but imperfect, whether the inconsistencies are material under the manual's substantial performance standard; the objective evidence framework rescues a missing form, not a worldwide computation. G&G State Tax Group provides water's edge election review and representation in election validity disputes alongside its state and local tax practice.