Payment Options
We accept multiple payment methods to accommodate researchers, institutions, and individual subscribers worldwide.
Visa, Mastercard, American Express, Discover. Secure processing via Base44 Payments.
No additional fees
Mail cash payment to our research office. Receipt provided upon confirmation.
No processing fees
Business or personal checks accepted. Allow 5-7 business days for processing.
No processing fees
Direct bank wire for annual or enterprise subscriptions. International wires accepted.
Your bank's wire fees apply
Automated clearing house transfers for US bank accounts. Set up in your dashboard.
No additional fees
PayPal Express Checkout available for all subscription tiers.
Standard PayPal rates