Nottingham Building Society saw both its gross lending and profit fall in the first half of 2018 year-on-year.
Gross lending reached £465m and profit stood at £6m in the first half of 2018, down from £544m and £7.6m in the first half of 2017.
Despite these falls the building society reached a milestone of £4bn of total assets.
David Marlow, chief executive of The Nottingham, said: “Cementing our relevance and appeal to members both now and in the future, has been a key focus throughout the first half.
“In the face of increasingly rapid societal change we are investing heavily to develop our digital capabilities and longer term aspiration to deliver a true Omni-channel experience where our members have the control and convenience of choosing how and when they interact with us.”
More than 13,000 members joined the society in the six months, as its branch network expanded to 67 following the addition of seven new branches at the end of 2017.