Actuarial tables are only used on life (life, retirement, workers compensation, health insurance) on top of them you need guaranteed interest rate and that give the risk price, but can be mathematically prove that charging only the risk price the insurance company eventually is going to fail, so an actuarial rate is added to avoid that. On top of that, another rate is added for administrative costs and "cost of capital" AKA profit for the shareholders. Finally, comercial costs are added and that's the price you pay.

For casualty (no life) the risk price is probability of event × cost of event, the rest is the same.