Over that time, B&Q "will continue to work with colleagues to look at ways they can enhance the overall reward package".
Kingfisher has also promised to look at what new pay, bonuses or other rewards it can introduce after that.
A B&Q spokesperson said: "One of our core principles has always been to be a great place to work and to offer an attractive overall reward package to all colleagues. Over the last 10 years, inconsistencies and complexities have arisen in our pay structures which have meant that colleagues doing the same job in the same store were being paid different amounts.
"For our business to be successful it is very important to us that our colleagues are paid well, consistently and in a way which rewards performance, and this is reflected in the new pay and reward structure that came into effect on 1 April 2016.
"Many colleagues will be better off or unaffected by these changes, and we have decided to extend the compensation so that no one will lose out for the next two years. This decision has the support of our elected staff representatives. Over the next two years, we will continue to work with our colleagues to look at ways we can enhance our overall reward package to ensure we remain one of the best and most attractive employers in retail."
- We pay a basic hourly rate of £7.66. This is 46p more than NLW.
- All our employees receive this, not just those over 25
- We also pay a bonus of up to 10 per cent of salary
- Paid breaks in effect increase pay by five per cent
- We offer a pension scheme with an employer contribution of up to 14 per cent
- Five weeks holiday, plus bank holidays
- We offer great career development opportunities and have colleagues who started on the shop floor as Saturday workers and are now in senior management roles