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Libraries and publishers around the world are invited to help us build an endowment, which is intended to lower participatory fees over time. Low operating costs make it possible for institutions of all sizes and budgets to participate in CLOCKSS.

Supporting Libraries

Libraries Materials Budgets Annual Contribution
Under $1 million $450
$1 - 2 million $600
$2 - 3 million $1,200
$3 - 4 million $1,800
$4 - 5 million $2,400
$5 - 7 million $3,000
$7 - 9 million $4,200
$9 - 11 million $5,400
$11 - 13 million $6,600
$13 - 15 million $7,800
$15 - 20 million $9,000
$20 - 25 million $12,000
Over $25 million $15,000

Consortial discounts are available. Please send email to info (at) CLOCKSS (dot) org.

Supporting Publishers

Back file ingest is free. Front file ingest is $.25/article with no charge for the first 500 articles. The fee is capped at $75,000/year.

Total Publishing Revenue Annual Contribution
Under $250,000 $ 200
$250,000 – 500,000 $ 400
$500,000 –1 million $ 800
$1 – 5 million $ 2,000
$5 – 10 million $ 4,000
$10 – 50 million $ 9,000
$50 – 200 million $15,000
Over $200 million $25,000

Front files start with the volume available at the time the CLOCKSS Supporting Publisher Agreement is signed.

CLOCKSS contributions are tax-deductible. For more information, please email info (at) CLOCKSS (dot) org.