Profit performance

QUARTERLY PROFIT
(NOK million)	Q4 2018	Q3 2018	Q2 2018	Q1 2018	Q4 2017
Net interest income	309	290	291	289	290
Other operating income	56	61	78	53	58
Total operating costs	152	152	150	149	144
Profit before impairment on loans	213	199	219	193	204
Impairment on loans, guarantees etc.	12	7	-5	2	-1
Pre-tax profit	201	192	224	191	205
Tax	60	43	50	50	48
Profit after tax	141	149	174	141	157

As a percentage of average assets
Net interest income	1.76	1.63	1.68	1.73	1.76
Other operating income	0.32	0.35	0.45	0.32	0.35
Total operating costs	0.86	0.86	0.87	0.89	0.88
Profit before impairment on loans	1.22	1.12	1.26	1.16	1.23
Impairment on loans, guarantees etc.	0.07	0.04	-0.03	0.01	-0.01
Pre-tax profit	1.15	1.08	1.29	1.15	1.24
Tax	0.34	0.24	0.29	0.29	0.29
Profit after tax	0.81	0.84	1.00	0.86	0.95