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Refinancing.fs: remortgage cost comparison and debt consolidation NPV #40

@simontreanor

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@simontreanor

Extend Refinancing.fs with two comparison calculations commonly needed by borrowers and advisers:

1. Remortgage / product transfer cost comparison

Compare the total cost of:

  • Staying on the current rate for the remaining term.
  • Switching to a new rate, including arrangement fees, legal costs, and any Early Repayment Charges (ERCs) on the existing product.

Output: net benefit/cost of switching in £ and as a break-even period in months.

2. Debt consolidation NPV

Compare two strategies:

  • Consolidate: Replace multiple existing debts with a single new facility at a given rate and term.
  • Pay individually: Continue paying each debt at its current rate until cleared.

Output: NPV of each strategy and the net saving/cost of consolidation, factoring in any fees and the opportunity cost of extending the overall repayment term.

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