Peak Debt and End Debt: How to Calculate a Bridging Loan Properly
Bridging loan calculations
Peak Debt and End Debt: How to Calculate a Bridging Loan Properly
A bridging loan should be tested at two points: the highest combined debt before the exit and the debt remaining after verified net proceeds are applied. These are commonly called peak debt and end debt.
The practical answer
01
The two calculations
Peak debt measures maximum exposure during the bridge. End debt measures the longer-term balance after the exit. Both must fit lender policy and the borrower’s circumstances.
| Calculation | Simplified formula | Purpose |
|---|---|---|
| Peak debt | Existing secured debt + new purchase or advance + costs + accrued interest | Tests maximum leverage, security and facility size |
| Net exit proceeds | Sale or refinance proceeds − selling costs − prior payouts | Shows the cash genuinely available to reduce debt |
| End debt | Peak debt − verified net exit proceeds | Tests the balance that remains after the bridge |
02
What belongs in peak debt
Leaving out costs or interest can create a funding shortfall before the exit. Use lender figures and current transaction documents.
Existing debt
Current mortgage balances, accrued interest, discharge costs and other secured claims.
New requirement
Purchase price balance, settlement adjustment, deposit reimbursement or approved project use.
Transaction costs
Stamp duty, legal work, valuation, lender fees and other amounts funded by the facility.
Bridging interest
Serviced, retained or capitalised interest through a realistic repayment date.
03
Use net proceeds—not the headline sale price
The full sale price is rarely available to reduce the bridge. Deduct every amount that must be paid at or before settlement.
Reconcile the exit proceeds
- Agent commission and marketing expenses
- Conveyancing and settlement costs
- Existing mortgage and secured creditor payouts
- Tax liabilities where applicable and advised
- Repair, preparation or incentive costs
- Any proceeds reserved for another required purpose
04
Worked example
Assume existing secured debt of $350,000, a new purchase requirement of $800,000, funded costs and interest of $70,000, and verified net sale proceeds of $700,000.
| Item | Amount | Running position |
|---|---|---|
| Existing debt | $350,000 | $350,000 |
| New requirement | $800,000 | $1,150,000 |
| Costs and modelled interest | $70,000 | $1,220,000 peak debt |
| Less net sale proceeds | ($700,000) | $520,000 end debt |
05
Stress the calculation
The base case is only the starting point. A useful model shows what happens if price, timing or costs move adversely.
Lower sale price
Reduce proceeds and recalculate the end debt and leverage.
Delayed settlement
Add interest, holding costs and any extension fees.
Higher costs
Include unexpected payouts, legal issues or transaction adjustments.
Refinance shortfall
Test whether the replacement facility supports less than expected.
Know the fallback before settlement
- Confirm who funds any gap above the approved facility.
- Check whether end debt remains serviceable or refinanceable.
- Set a decision date for price changes or an alternative exit.
Sources
Official calculation examples and related guidance
Different lenders apply different policies, value bases and buffers.
Continue the bridging finance series
Related guides for the next decision
Frequently asked questions
Peak debt and end debt FAQs
Does peak debt include capitalised interest?
Yes, where interest is added to the facility. The model should include interest through a realistic repayment date and any applicable fees.
Why use net sale proceeds?
Agent, legal, tax and secured payout amounts reduce the cash available to repay the bridge.
Can the end debt be zero?
Yes, if verified exit proceeds fully repay the peak debt and costs. This is sometimes described as a no-end-debt bridge.
What if the end debt is too high?
The borrower may need more equity, a lower purchase requirement, stronger net proceeds, another acceptable exit or a different structure.
A clearer bridging review
Calculate the maximum exposure and the final debt using verified—not optimistic—figures.
Zip Funding can review the security, existing debt, transaction deadline, net sale or refinance proceeds and fallback exit together. Any facility remains subject to lender appetite, valuation, due diligence, legal documentation and approval.
General information only. This article does not constitute financial, legal, tax or credit advice. Bridging finance can involve higher costs, short terms, property security and enforcement risk. Obtain independent advice appropriate to the transaction.
