Highlights

• OSB Group paid 35.9p per share in Ordinary Dividends over the past year, split into two instalments.

• The latest Interim Dividend rose 5% to 11.8p even though half-year pre-tax profit slipped 3%.

• Net loans grew 1.3% to £26.3bn while the net interest Margin eased to 223 basis points.

• Management guides to a 2026 margin of 215 to 220 basis points if funding costs stay elevated.

Profit down, dividend up. It is an unusual pairing, and it is exactly what OSB Group (LSE:OSB) delivered at its half-year stage, lifting the interim payout 5% to 11.8p while pre-tax profit eased 3% to £187.2m. For income hunters the lender now offers a trailing Yield of roughly 7% on a share price of 510p, backed by a growing Loan book. The question is how long a falling margin can keep funding a rising cheque.

What shareholders have actually been paid

Two ordinary dividends sit inside the past twelve months. A final of 24.1p went ex-dividend on 2 April 2026 and was paid on 13 May. The interim of 11.8p followed, going ex on 13 August and paying on 18 September. Together that is 35.9p, which equals 7.04% of the 510p price. No Special Dividend fell inside the window. A year earlier the same two payments were 22.9p and 11.2p, so the final rose about 5.2% and the interim 5.4%, a steady lift rather than a lurch.

The half-year numbers behind the payout

Interim results for the six months to 30 June 2026 showed net interest income up 1% to £339.8m, while administrative expenses rose 4% to £136.5m as the group invested in its transformation programme. Pre-tax profit fell 3% to £187.2m. Net loans grew 1.3% to £26.3bn and originations climbed 10% to £2.3bn, which shows Demand for lending has not dried up. The cost line is the one to watch, because spending is growing faster than income.

Margin pressure is the central issue

The net interest margin slipped to 223 basis points, mainly because retail savers now cost more to attract. The group expects the 2026 margin to land between 215 and 220 basis points, and a return on tangible shareholders' funds of around 12.5%, but both guidance points assume funding costs stay elevated. A bank earns its dividend from the gap between what it charges borrowers and what it pays savers. If that gap narrows further, profit growth gets harder to find.

Risks and what would change the picture

The trailing payout rose despite lower profit, so a further squeeze on margin or a pick-up in costs could slow future increases. Lending growth of just over 1% in the half is modest, and the cost of transformation spending is not yet visibly paying back in earnings. Counter to that, originations growing 10% gives the loan book fuel for the second half. Investors should compare the full-year result against the guided margin range before assuming the pattern of annual increases continues.

What to watch next

The next hard evidence will be the full-year result and the margin outturn against the 215 to 220 basis point guide. Also worth tracking is whether the 4% rise in administrative expenses starts to ease once the transformation programme matures. Investors reading the 7.04% trailing yield should remember that it is built on a 510p price taken from the latest quoted figure, and that any share price move changes the yield instantly even when the pence per share stay fixed.

How funding costs shape a lender's profit

A specialist lender such as OSB Group (LSE:OSB) raises money mainly from savers and lends it to borrowers at higher rates. When savers demand more interest, funding costs rise, and the margin narrows unless loan pricing rises by the same amount. The slip to 223 basis points reflects this pressure. A basis point is one hundredth of a percentage point, so the fall is small in each step but significant across a loan book of £26.3 billion.

Why a rising dividend can coexist with lower profit

A board may raise the dividend when it believes profit is temporarily lower because of investment, or when Capital is ample. OSB's interim rose 5% to 11.8p even though profit fell 3%. This is possible if the payout ratio, which is the share of profit paid out, is allowed to rise slightly. Investors should note that such increases cannot be repeated indefinitely if Earnings keep falling, so the full-year result is the key test for LSE:OSB.

Originations and the loan book

Originations are new loans written in the period. A 10% rise to £2.3 billion shows that borrowers are still active and that the lender is finding business. Net loans grew by only 1.3% because repayments and redemptions offset the new lending. In the second half, a higher level of originations would help to grow the loan book and support interest income, provided that Credit quality remains sound.