Source: Sharecast
Group sales excluding VAT and fuel rose 5.1% in the 26 weeks to 23 August, to £33.05bn, while adjusted operating profits sparked 1.5% to £1.67bn.
On a like-for-like basis, group sales rose 4.3%, including a 4.9% jump in the UK.
Tesco said volume-driven market share gains, a savings programme and the good weather had helped offset higher costs - including higher employer National Insurance contributions and the new packaging levy - in the UK and Ireland.
Ken Murphy, chief executive, said: "I am pleased with our first half performance, which builds on already strong momentum.
"Our market share gains in the UK are a particular highlight and reflect the decisive action we took at the start of the year to further invest in value, quality and service.
"The extension of our savings programme is helping offset new operating cost inflation.
"The steps we have taken to keep prices own for customers have improved our price position relative to the market."
Looking to the second half, the grocer acknowledged that competitive intensity remained "elevated".
But it continued: "However, in the first half, a better-than-expected customer response to our actions and the benefit of an extended period of good weather have helped offset the cost of our investments.
"We now expect full-year group adjusted operating profit between £2.9bn and £3.1bn, an increase from the previous range of between £2.7bn and £3.0bn."
On statutory basis, interim group revenues rose 3.6% to £36.04bn but pre-tax profits were 6.3% lower at £1.31bn, due to separation costs related to the disposal of its banking operations to Barclays a year previously.