I'll say this nicely, but I don't think you're looking at the overall picture from the right angle.
In my opinion, a larger deposit is going to result in lower monthly payments which means that,whilst the amount owed will start off lower than if a lower deposit had been paid, the overall gap between balance outstanding and the value of the car will be broadly similar, once you are some way into the deal.
Similar to a large discount, a large deposit is going to reduce what it is owed on the car over the first few months in relation to its value, but in the case of the large deposit you haven't gained equity if you got rid of the car are that point because you threw the larger deposit in, thus spending that supposedly regained equity in the first place.
Whether or not we agree on how quickly into a term the amounts owed will end up the same, my understanding of your interpretation of the situation is that larger deposits can improve purchasers' chances of being in a positive equity situation, and people might therefore infer they should increase their intended deposit in the hope of seeing some / more it back later in the form of equity. I disagree with that logic.
When I think about it, the most important fact here is you or I have no idea what is going to happen to the value of anybody's car. When budgeting for a pcp therefore, my opinion is that everybody's financial calculations should assume the worst: that being that the pcp runs to its term and that there will be no equity at any point during the deal, all your money has been spent with no return, irrespective of whether it was spent in the form of monthlies or deposit.
In this scenario, I believe the purchaser is better off using a deposit amount which that are happy to lose, and not start putting several thousands of pounds in with the hope that they expect to see some it back. By the end of the term, if the car is worth £1k more than the final sum owed, that's good news, but it has no link to the size of deposit.
How much deposit is the right amount? Something you don't mind kissing goodbye to. Something that still leaves funds in the bank for whatever else you need or want. Something that gets you the sort of monthly payment you know you can comfortably commit to for the whole term.These would be my considerations; I wouldn't be getting into the business of predicting when and how much money I expect to be coming back to me because it is a complete unknown.
I understand you, but disagree. You're talking as if a big deposit is lost money that could be saved by putting a smaller deposit in and ending up with big monthlies. You don't save any money overall by putting a small deposit in instead of a big one.
Take a £30k car, with a £15500 GFV after 4 years. Assuming 6.7% APR (as it was until VW dropped it to raise sales following the emissions scandal), this should all be quite similar to the OP's finance taken.
You put down 30% deposit, so the finance is coming down from £21k owed at the start to £15500 owed 4 years later, you end up with monthlies of £217.50 x 48 months, total paid = £9k deposit + £10440 monthlies = £19440.
You put down 10% deposit, so the finance is coming down from £27k owed at the start to £15500 owed 4 years later, you end up with monthlies of £360.25 x 48 months, total paid = £3k deposit + £17292 monthlies = £20292.
Big deposit saves interest = Win for buyer.
There's only one point at which the difference between a big deposit and a small deposit end up with the same equity - the end of the deal. They really don't close up to a negligible amount until well into the final year.
I'm not claiming that if you put more down you'll get a bigger amount back at the other end (I said just the opposite, that deposit is spent on day 1). I'm saying that if you put a bigger deposit down and choose to trade in before the end of the PCP, a bigger deposit means you can do it earlier and not be in negative equity.
2 Years into the deal above, with a 30% deposit you owe VWFS £18546 inc GFV, with a likely p/x price of £19975 (85% of used sticker price £23500). £1429 Positive equity.
2 Years into the deal above, with a 10% deposit you owe VWFS £21873 inc GFV, with a likely p/x price of £19975 (85% of used sticker price £23500). Negative equity. If you want to get out, you owe VWFS £1898, they don't just write that off, and you've already paid £3426 more in monthlies, That's £6753 vs £6000 extra paid in deposit.
If you are into a PCP and see it through to the end, you have a definitive minimum value - your GFV, most would hope to be getting 110% of GFV on past history.