What is a secured boat loan?
A secured boat loan — also called a marine loan or yacht mortgage in larger transactions — is a lending product specifically designed for vessel purchases. The lender advances funds to the borrower and registers a charge over the vessel as security. If the borrower defaults, the lender can repossess and sell the vessel to recover the outstanding balance.
The security reduces the lender's risk, which is why secured marine loans offer materially lower interest rates than unsecured alternatives. Specialist marine lenders — including dedicated marine finance houses, private banks with marine desks, and some high street banks — offer these products. Terms are typically 10–15 years for vessels in good condition, with LTV of 60–70%.
What is an unsecured personal loan?
An unsecured personal loan is a general-purpose borrowing product — the lender has no claim on any specific asset. The borrower's creditworthiness and income are the sole basis for the lending decision. Because there is no security, the lender charges higher interest rates to compensate for the increased risk.
Personal loans are widely available from high street banks, building societies, and online lenders. Approval is faster and the documentation requirements are simpler. But the rate differential is significant — and on larger purchases, it adds up materially over the loan term.

Interest rates compared
| Loan type | Typical interest rate | Notes |
|---|---|---|
| Secured marine loan | 5–8% (variable by profile) | Rate tied to SONIA / base rate plus margin |
| Personal loan (£10k–£25k) | 7–15% | Varies widely by provider and credit profile |
| Personal loan (above £25k) | 10–20%+ | Specialist providers, often higher risk pricing |
The rate differential is most significant on larger amounts and longer terms. On a £100,000 purchase financed at 70% LTV (£70,000 borrowed), the difference between a 6% secured marine rate and a 12% personal loan rate over 10 years is approximately £25,000 in additional interest. On larger vessels, the difference is proportionally larger.
Maximum loan amounts
Personal loans are typically capped at £25,000–£50,000 by mainstream providers. Some specialist unsecured lenders will go higher, but at elevated rates that further erode the case for this route on larger purchases.
Secured marine loans have no practical upper limit beyond the LTV constraint applied to the vessel's value. Lenders will advance 60–70% of a vessel valued at any amount — from £30,000 to £30 million. The scale of available financing on a secured basis is the primary reason yacht buyers use marine loans rather than personal loans for anything above a small craft.
Repayment terms
| Feature | Secured boat loan | Personal loan |
|---|---|---|
| Maximum term | 10–15 years | 1–7 years (most providers) |
| Balloon / bullet option | Yes — common | No |
| Early repayment | Possible, may have fee | Usually allowed, check terms |
| Fixed vs variable | Both available | Usually fixed |
The longer term available on a marine loan significantly reduces the monthly payment for a given borrowing amount — an important consideration for buyers managing cash flow alongside the running costs of vessel ownership.
Eligibility requirements
A personal loan requires primarily a credit check and income assessment. No vessel documentation, survey, or insurance is needed. Approval can be in principle within hours and funded within days.
A secured marine loan requires a vessel survey (for used vessels), confirmation of insurance, flag registration, and legal work to register the lender's charge over the vessel. The process typically takes several weeks from application to drawdown. For buyers with strong profiles purchasing well-maintained vessels, the process is straightforward — but it requires more preparation time than a personal loan.
Which to choose by purchase price
| Purchase price | Recommended route | Rationale |
|---|---|---|
| Under £15,000 | Personal loan | Secured loan setup cost not worth it at this value |
| £15,000 – £30,000 | Either — compare rates | Rate differential starting to matter; secured often better |
| £30,000 – £100,000 | Secured marine loan | Rate and term advantage clearly outweigh setup cost |
| Over £100,000 | Secured marine loan | Personal loan insufficient; secured only practical route |
The personal loan is faster and simpler. The boat loan is cheaper, allows more borrowing, and over longer terms. For any purchase above £30,000, the maths almost always favours the secured route.