Entry rules for Kazakhstan depend on nationality: some visitors travel visa-free under bilateral arrangements, while others need an e-visa through the Visa-migration portal of the Republic of Kazakhstan. Check your passport country on the official portal before booking.
Estimated cost: Not stated in the captured sources - the e-visa fee and any service charges are set on the official Visa-migration portal.
Processing: Not stated in the captured sources - confirm current processing times on the Kazakhstan Visa-migration portal when you apply.
Kazakhstan government sources list both an e-visa route (gov.kz MFA) and the Visa-migration portal for applications; business travellers should confirm the correct visa category for a B2B exhibition visit before applying.
Official