0000319676 2011-05-01 2012-04-30 0000319676 ctfr1:S000005140Member 2011-05-01 2012-04-30 CALVERT TAX FREE RESERVES Other 2011-12-31 0000319676 false 2012-11-01 2012-11-01 2012-04-30 <div style="padding-left: 0%; padding-right: 0%"> SUPPLEMENT TO CALVERT TAX-FREE RESERVES PROSPECTUS DATED APRIL 30, 2012 Calvert Tax-Free Bond Fund Date of Supplement: November 1, 2012After the last paragraph in the section “Investments, Risks and Performance – Principal Investment Strategies” in each Fund Summary (Portfolio Summary for Calvert VP Income Portfolio), insert the following:Tobacco Exclusion. The Fund seeks to avoid investing in companies classified under the tobacco industry sector of the Barclays Global Aggregate Index, the Barclays U.S. High Yield Index or the Barclays Global Emerging Market Index; or, in the opinion of the Fund’s Advisor, any similar securities in the Barclays Municipal Index.</div> <div style="padding-left: 0%; padding-right: 0%"> SUPPLEMENT TO CALVERT TAX-FREE RESERVES PROSPECTUS DATED APRIL 30, 2012 Calvert Tax-Free Bond Fund Date of Supplement: November 1, 2012After the last paragraph in the section “Investments, Risks and Performance – Principal Investment Strategies” in each Fund Summary (Portfolio Summary for Calvert VP Income Portfolio), insert the following:Tobacco Exclusion. The Fund seeks to avoid investing in companies classified under the tobacco industry sector of the Barclays Global Aggregate Index, the Barclays U.S. High Yield Index or the Barclays Global Emerging Market Index; or, in the opinion of the Fund’s Advisor, any similar securities in the Barclays Municipal Index.</div>