Sirius Minerals said its Woodsmith mine project in North Yorkshire remained on track to deliver first polyhalite and commercial production on time and on budget.
Current diaphragm walling activities are about two months behind schedule following some delays commissioning equipment and adverse weather conditions.
The company, however, said it was confident the "small loss of time" would be recovered over the remainder of the project schedule.
Sirius said it was continuing negotiations with a number of potential customers in multiple regions.
Activities relating to the stage two financing process of the project would gather momentum as the coming year unfolds, it added.