It depends. Pension plans use different rules to figure out the value of their members' benefits. We will calculate the cost of bringing the service you earned in the other plan over to PSPP. Then we will send you a package with the details before you decide whether or not you want to proceed.
All pension plans are priced differently, so the benefit you earned in your previous plan might not match the cost of buying the same amount of service in PSPP. If your previous plan's benefit cost at least as much as the PSPP benefit, you will not have to pay anything more. The full amount of service will be credited to PSPP.
On the other hand, if the cost of buying PSPP service is more than the benefit from your previous plan, this will result in a shortfall. You will receive a portion of the service credit you had originally earned, and you will have the option of buying back the difference. Paying for this shortfall means you could retire earlier with a larger PSPP pension than if you did not buy the service.