0001047304 2012-09-27 2012-09-27 0001047304 pimco:S000009659Member pimco:AAAAMember 2012-09-27 2012-09-27 0001047304 pimco:S000010204Member pimco:AAAAMember 2012-09-27 2012-09-27 0001047304 pimco:PAllAssetSupplementMember pimco:BBBBMember 2012-09-27 2012-09-27 0001047304 pimco:S000009659Member pimco:BBBBMember 2012-09-27 2012-09-27 0001047304 pimco:PAllAuthorSupplementMember pimco:CCCCMember 2012-09-27 2012-09-27 0001047304 pimco:S000010204Member pimco:CCCCMember 2012-09-27 2012-09-27 xbrli:pure iso4217:USD xbrli:shares iso4217:USD xbrli:shares Other 2012-09-27 2012-09-27 PIMCO VARIABLE INSURANCE TRUST 0001047304 false 2012-09-27 2012-09-27 <div style="display: none">~ http://xbrl.sec.gov/rr/role/RiskReturnDetailData column period compact * row dei_DocumentInformationDocumentAxis compact * row dei_LegalEntityAxis compact * row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * row primary compact * ~</div> <div style="font-size:14;padding-top:5;padding-bottom:0;padding-left:0; text-align: center"> <b>PIMCO Variable Insurance Trust</b></div> <p></p> <p></p> <div style="font-size:12;padding-top:10;padding-bottom:0;padding-left:0; text-align: center"> <b>Supplement Dated September 27, 2012 to the</b></div> <div style="font-size:12;padding-top:5;padding-bottom:0;padding-left:0; text-align: center"> <b>Administrative Class Prospectus, Institutional Class Prospectus and Advisor Class and Class M</b></div> <div style="font-size:12;padding-top:5;padding-bottom:0;padding-left:0; text-align: center"> <b>Prospectus (each dated April 30, 2012) (each a "Prospectus"), each as supplemented</b></div> <div style="font-size:12;padding-top:10;padding-bottom:0;padding-left:0; text-align: center"> <b>from time to time</b></div> <p></p> <p></p> <p></p> <div style="font-size:12;padding-top:5;padding-bottom:0;padding-left:0; text-align: center"> <b>Disclosure Related to PIMCO All Asset Portfolio</b></div> <p></p> <p></p> <div style="font-size:12;padding-top:10;padding-bottom:0;padding-left:0; text-align: center"> <b>Disclosure Related to PIMCO All Asset All Authority Portfolio</b></div> <p></p> <p></p> <div style="font-size:12;padding-top:5;padding-bottom:0;padding-left:0; text-align: left"> The Portfolio invests under normal circumstances substantially all of its assets in Institutional Class or, as applicable, Class M shares of any funds of the PIMCO Funds and PIMCO Equity Series, affiliated open-end investment companies, except funds of funds, and shares of any actively-managed funds of the PIMCO ETF Trust, an affiliated investment company (collectively, "Underlying PIMCO Funds"). </div> <p></p> <p></p> <div style="font-size:12;padding-top:5;padding-bottom:0;padding-left:0; text-align: left"> The Portfolio invests under normal circumstances substantially all of its assets in Institutional Class or, as applicable, Class M shares of any funds of the PIMCO Funds and PIMCO Equity Series, affiliated open-end investment companies, except funds of funds, and shares of any actively-managed funds of the PIMCO ETF Trust, an affiliated investment company (collectively, "Underlying PIMCO Funds").</div> <p></p> <p></p> <div style="font-size:12;padding-top:5;padding-bottom:0;padding-left:0; text-align: left"> The Portfolio invests under normal circumstances substantially all of its assets in Institutional Class or, as applicable, Class M shares of any funds of the PIMCO Funds and PIMCO Equity Series, affiliated open-end investment companies, except funds of funds, and shares of any actively-managed funds of the PIMCO ETF Trust, an affiliated investment company (collectively, "Underlying PIMCO Funds").</div> <p></p> <p></p> <div style="font-size:12;padding-top:5;padding-bottom:0;padding-left:0; text-align: left"> The Portfolio invests under normal circumstances substantially all of its assets in Institutional Class or, as applicable, Class M shares of any funds of the PIMCO Funds and PIMCO Equity Series, affiliated open-end investment companies, except funds of funds, and shares of any actively-managed funds of the PIMCO ETF Trust, an affiliated investment company (collectively, "Underlying PIMCO Funds"). </div> <p></p> <div style="font-size:12;padding-top:5;padding-bottom:0;padding-left:0; text-align: left"> <i>Effective immediately, the first sentence of the first paragraph of the "Principal Investment Strategies" section of the PIMCO All Asset All Authority Portfolio's Portfolio Summary in the Administrative Class Prospectus and Advisor Class and Class M Prospectus is deleted in its entirety and replaced with the following:</i></div> <p></p> <div style="font-size:12;padding-top:5;padding-bottom:0;padding-left:0; text-align: left"> <i>Effective immediately, the first sentence of the first paragraph of the "Principal Investment Strategies" section of the PIMCO All Asset Portfolio's Portfolio Summary in each Prospectus is deleted in its entirety and replaced with the following:</i></div> <p></p> <p></p> <div style="font-size:12;padding-top:5;padding-bottom:0;padding-left:0; text-align: left"> <i>Effective immediately, the first sentence of the first paragraph of the "Principal Investment Strategies" section in the Portfolio Summary in each Prospectus is deleted in its entirety and replaced with the following: </i></div> <p></p> <p></p> <div style="font-size:12;padding-top:5;padding-bottom:0;padding-left:0; text-align: left"><i> Effective immediately, the first sentence of the first paragraph of the "Principal Investment Strategies" section in the Portfolio Summary in each Prospectus is deleted in its entirety and replaced with the following:</i></div> <p></p> <div style="font-size:14;padding-top:5;padding-bottom:0;padding-left:0; text-align: center"> <b>PIMCO Variable Insurance Trust</b></div> <p></p> <p></p> <div style="font-size:12;padding-top:10;padding-bottom:0;padding-left:0; text-align: center"> <b>Supplement Dated September 27, 2012 to the</b></div> <div style="font-size:12;padding-top:5;padding-bottom:0;padding-left:0; text-align: center"> <b>PIMCO All Asset Portfolio Administrative Class Prospectus; PIMCO All Asset Portfolio Advisor </b></div> <div style="font-size:12;padding-top:5;padding-bottom:0;padding-left:0; text-align: center"> <b>Class Prospectus; PIMCO All Asset Portfolio Institutional Class Prospectus; and PIMCO All Asset</b></div> <div style="font-size:12;padding-top:10;padding-bottom:0;padding-left:0; text-align: center"> <b>Portfolio Class M Prospectus (each dated April 30, 2012) (each a "Prospectus"), each as </b></div> <div style="font-size:12;padding-top:10;padding-bottom:0;padding-left:0; text-align: center"> <b>supplemented from time to time</b></div> <p></p> <p></p> <div style="font-size:14;padding-top:5;padding-bottom:0;padding-left:0; text-align: center"> <b>PIMCO Variable Insurance Trust </b></div> <p></p> <p></p> <div style="font-size:12;padding-top:10;padding-bottom:0;padding-left:0; text-align: center"> <b>Supplement Dated September 27, 2012 to the</b></div> <div style="font-size:12;padding-top:5;padding-bottom:0;padding-left:0; text-align: center"> <b>PIMCO All Asset All Authority Portfolio Administrative Class Prospectus; PIMCO All Asset All</b></div> <div style="font-size:12;padding-top:5;padding-bottom:0;padding-left:0; text-align: center"> <b>Authority Portfolio Advisor Class Prospectus; and PIMCO All Asset All Authority Portfolio</b></div> <div style="font-size:12;padding-top:5;padding-bottom:0;padding-left:0; text-align: center"> <b>Class M Prospectus (each dated April 30, 2012) (each a "Prospectus"), each as supplemented</b></div> <div style="font-size:12;padding-top:5;padding-bottom:0;padding-left:0; text-align: center"> <b>from time to time</b></div> <p></p> <p></p> <p></p> <div style="font-size:12;padding-top:5;padding-bottom:0;padding-left:0; text-align: left"> The index reflects non-seasonally adjusted returns. As of November 1, 2012, the Portfolio's secondary benchmark index is the same CPI + 500 Basis Points benchmark as described, but with seasonally adjusted returns. </div> <p></p> <p></p> <div style="font-size:12;padding-top:5;padding-bottom:0;padding-left:0; text-align: left"><i> In addition, effective immediately, the following disclosure is added after the third sentence of the second paragraph of the "Performance Information" section of the PIMCO All Asset Portfolio's Portfolio Summary in each Prospectus:</i></div> <p></p> <p></p> <div style="font-size:12;padding-top:5;padding-bottom:0;padding-left:0; text-align: left"><i> In addition, effective immediately, the following disclosure is added after the third sentence of the second paragraph of the "Performance Information" section in the Portfolio Summary in each Prospectus:</i> </div> <p></p> <p></p> <div style="font-size:12;padding-top:5;padding-bottom:0;padding-left:0; text-align: left"> The index reflects non-seasonally adjusted returns. As of November 1, 2012, the Portfolio's secondary benchmark index is the same CPI + 500 Basis Points benchmark as described, but with seasonally adjusted returns. </div> <p></p>