Accounts for the year to year to December 31 2016 show the firm made pre-tax profits of £69.7m on a turnover of £148.4m compared to £2.3m from a turnover of £125m last time.
Canary Wharf Contractors also paid only £11,500 in Corporation Tax compared to £13.9m the firm would expect to pay at the standard rate of 20% last year..
Notes to the accounts show that the tax charge was written off against losses at other group companies.
They also show inter-subsidiary loans of £934m.
A Canary Wharf Contractors spokesman said the accounts had been drawn-up “in line with standard accounting practices.”