A recruitment campaign has signed up 2000 businesses offering discounts to holders of SuperGold Cards, taking the total to 3600.
The new recruits include businesses in the health care, trades, automotive, food and drink, home and garden, retail and accommodation sectors.
"The target I set in May of doubling the size of the programme over the next few years has already been exceeded," says Senior Citizens Minister Jo Goodhew.
The card gives discounts to all eligible seniors and veterans discounts from businesses and easy access to government entitlements and local authority services and concessions.
It was launched in 2007 and there are nearly 600,000 holders.
New Zealand First leader Winston Peters, who instigated the card scheme as a minister in the previous government, welcomed its expansion but reiterated a call for the card to entitle holders to three free visits to general practitioners a year.
Mr Peters is also urging the government to adopt a 10 per cent power discount over the winter months for cardholders.
"The government has no excuse. We have legislation written and ready to go for both the power discount and free doctor visits schemes."