National Grid 2016 Annual Report Download - page 150
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29. Actuarial information on pensions and other post-retirement benefits continued
Actuarial assumptions
The Company has applied the following financial assumptions in assessing DB liabilities.
UK pensions US pensions US other post-retirement benefits
2016
%
2015
%
2014
%
2016
%
2015
%
2014
%
2016
%
2015
%
2014
%
Discount rate13.3 3.3 4.3 4.3 4.1 4.8 4.3 4.1 4.8
Rate of increase in salaries23.2 3.2 3.6 3.5 3.5 3.5 3.5 3.5 3.5
Rate of increase in RPI32.9 2.9 3.3 n/a n/a n/a n/a n/a n/a
Initial healthcare cost trend rate n/a n/a n/a n/a n/a n/a 7.5 8.0 8.0
Ultimate healthcare cost trend rate n/a n/a n/a n/a n/a n/a 4.5 5.0 5.0
1. The discount rates for pension liabilities have been determined by reference to appropriate yields on high-quality corporate bonds prevailing in the UK and US debt markets at the
reportingdate.
2. A promotional scale has also been used where appropriate. The UK assumption stated is that relating to service prior to 1 April 2014. The UK assumption for the rate of increase in
salariesfor service after this date is 2.1% (2015: 2.1%).
3. This is the key assumption that determines assumed increases in pensions in payment and deferment in the UK only. The assumptions for the UK were 2.9% (2015: 2.9%; 2014: 3.3%)
forincreases in pensions in payment and 2.9% (2015: 2.9%; 2014: 3.3%) for increases in pensions in deferment.
For sensitivity analysis see note 33.
2016 2015 2014
UK
years
US
years
UK
years
US
years
UK
years
US
years
Assumed life expectations for a retiree age 65
Today:
Males 22.8 21.8 22.7 21.7 22.9 20.6
Females 25.2 24.0 25.1 23.9 25.4 22.9
In 20 years:
Males 25.1 23.5 24.9 23.4 25.2 22.8
Females 27.6 25.6 27. 4 25.6 27. 8 24.7
Maturity profile of DB obligations
The weighted average duration of the DB obligation for each category of scheme is 16 years for UK pension schemes; 13 years for US pension
schemes and 17 years for US other post-retirement benefits.
148 National Grid Annual Report and Accounts 2015/16 Financial Statements
Notes to the consolidated financial statements
– supplementary information continued