How long is the Lithuanian business or lawful-activity residence permit valid, and can I renew it?

This is a temporary residence permit, typically granted for up to two years at a time rather than indefinitely. The exact duration can depend on your circumstances and the nature of the activity.

You can apply to renew it before it expires as long as the underlying business or lawful activity continues to meet the requirements, for example that the company is still operating and you can support yourself. Each renewal is assessed afresh, so it is important to keep the business genuinely active throughout.