1.3.1 Actual commitments on signed schemes
As explained in the introduction, the capital investment committed by the private sector has to be repaid with interest, along with payments for services. These unitary charges are paid by the NI Executive to the private sector over the 25-30 year length of PPP contracts. As noted, capital investment through PPP now equals £1.29 billion. Figure 3 (below) plots the profile of the £4.7 billion of unitary charges (in nominal terms) that accrue to the 35 contracts signed by March 2008. These payments rise from £1.5 million in 1997-08 to reach a peak of £167 million in 2010-11.
Figure 3. Total unitary charges to be paid on schemes
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Source: www.hm-treasury.gov.uk