An annual Essential subscription will soon cost $80 per year, up from $60. The Extra plan is going up by $35 to $135 per year, while an annual Premium plan will soon cost $40 more at $160.
The price changes won't take effect for current PS Plus users on an annual plan until their next renewal date, on or after 6 November. The new pricing will apply to changes to your plan between 6 September and 6 November.
Sony has not announced changes to the monthly ($10 for Essential, $15 for Extra and $18 for Premium) or quarterly ($25 for Essential, $40 for Extra and $50 for Premium) for the time being. It notes that the annual plan is still less expensive than a monthly or quarterly subscription in the long run.
Sony is following Microsoft, which increased its prices a few months ago, making it possible.