Label

Element

Value

Risk Return Abstract

rr_RiskReturnAbstract

Document Type

dei_DocumentType

497

Document Period End Date

dei_DocumentPeriodEndDate

Dec. 31, 2017

Registrant Name

dei_EntityRegistrantName

WILSHIRE VARIABLE INSURANCE TRUST

Central Index Key

dei_EntityCentralIndexKey

0001026708

Amendment Flag

dei_AmendmentFlag

false

Document Creation Date

dei_DocumentCreationDate

Oct. 30, 2018

Document Effective Date

dei_DocumentEffectiveDate

Oct. 30, 2018

Prospectus Date

rr_ProspectusDate

May 01, 2018

Wilshire 2015 Fund

Risk Return Abstract

rr_RiskReturnAbstract

Prospectus Suplement Text Block

wvit_ProspectusSupplementTextBlock

October 30, 2018

WILSHIRE VARIABLE INSURANCE TRUST

Wilshire 2015 Fund

Wilshire 2025 Fund

Wilshire 2035 Fund

(collectively, the “Funds”)

Supplement to the Summary Prospectuses and Prospectus of the Funds,

each dated May 1, 2018, as amended

With regard to each Fund, please replace the returns for the Wilshire 5000 Index^SM in the Average Annual Total Returns Table for the period ended December 31, 2017, as referenced in the section titled “Performance” in each Fund’s summary prospectus dated May 1, 2018, as amended, and the Funds’ prospectus dated May 1, 2018, as amended, with the updated information that follows.

Average Annual Total Returns (periods ended December 31, 2017)	1 year	5 years	10 years
Wilshire 5000 IndexSM (reflects no deduction for fees, expenses or taxes)	21.00%	15.67%	8.64%

If you have any questions regarding the Funds, please call (866) 591-1568.

Investors Should Retain this Supplement for Future Reference.

Wilshire 2025 Fund

Risk Return Abstract

rr_RiskReturnAbstract

Prospectus Suplement Text Block

wvit_ProspectusSupplementTextBlock

October 30, 2018

WILSHIRE VARIABLE INSURANCE TRUST

Wilshire 2015 Fund

Wilshire 2025 Fund

Wilshire 2035 Fund

(collectively, the “Funds”)

Supplement to the Summary Prospectuses and Prospectus of the Funds,

each dated May 1, 2018, as amended

With regard to each Fund, please replace the returns for the Wilshire 5000 Index^SM in the Average Annual Total Returns Table for the period ended December 31, 2017, as referenced in the section titled “Performance” in each Fund’s summary prospectus dated May 1, 2018, as amended, and the Funds’ prospectus dated May 1, 2018, as amended, with the updated information that follows.

Average Annual Total Returns (periods ended December 31, 2017)	1 year	5 years	10 years
Wilshire 5000 IndexSM (reflects no deduction for fees, expenses or taxes)	21.00%	15.67%	8.64%

If you have any questions regarding the Funds, please call (866) 591-1568.

Investors Should Retain this Supplement for Future Reference.

Wilshire 2035 Fund

Risk Return Abstract

rr_RiskReturnAbstract

Prospectus Suplement Text Block

wvit_ProspectusSupplementTextBlock

October 30, 2018

WILSHIRE VARIABLE INSURANCE TRUST

Wilshire 2015 Fund

Wilshire 2025 Fund

Wilshire 2035 Fund

(collectively, the “Funds”)

Supplement to the Summary Prospectuses and Prospectus of the Funds,

each dated May 1, 2018, as amended

With regard to each Fund, please replace the returns for the Wilshire 5000 Index^SM in the Average Annual Total Returns Table for the period ended December 31, 2017, as referenced in the section titled “Performance” in each Fund’s summary prospectus dated May 1, 2018, as amended, and the Funds’ prospectus dated May 1, 2018, as amended, with the updated information that follows.

Average Annual Total Returns (periods ended December 31, 2017)	1 year	5 years	10 years
Wilshire 5000 IndexSM (reflects no deduction for fees, expenses or taxes)	21.00%	15.67%	8.64%

If you have any questions regarding the Funds, please call (866) 591-1568.

Investors Should Retain this Supplement for Future Reference.