Do unused lease miles roll over?

Usually no. On almost every lease, the miles you're allowed are a yearly average across the whole term, not a monthly bucket you carry forward — and any miles you don't use simply expire when the lease ends. A light-driving month doesn't bank credit for a heavy one later, and coming in under your limit doesn't earn anything back. The one thing that helps is that the allowance is spread over the full lease, so a low-mileage stretch does leave you more room for a busier one down the road, even though it never becomes a formal balance you can see.

In almost all cases, no. The miles are baked into the price of the lease from the day you sign, so driving less than your limit doesn't come back to you as a refund at the end. A small number of leasing companies offer a limited credit for unused miles or let you adjust your allowance mid-lease, but it's the exception, not the rule, and it's usually capped. The practical takeaway: don't overbuy miles hoping to be reimbursed — pick an allowance that fits your real driving so you're not paying for miles you'll never use.

Only if you genuinely expect to need them. Buying miles when you sign is much cheaper than paying the overage charge at the end, so it's a smart move when you know you drive a lot. But if you buy a big cushion just in case and never use it, that money is gone — unused miles don't roll over or come back. The honest approach is to estimate your real yearly driving, add a modest buffer, and stop there, rather than paying today for a worst-case year that may never happen.

You won't be charged anything and the car will simply be worth a little more at the end because it's low-mileage — but you don't get that value directly unless you act on it. If you're well under your limit late in the lease, one option is to buy the car (its low miles can make the set buyout price a genuine deal) or sell or trade it while it's worth more than you owe. Otherwise you just hand back a nicer car and move on. It's a good reminder to size your miles honestly next time so you're not paying for a limit you never come close to.

Match your allowance to how you actually drive, and keep your cash free. Overbuying miles or putting a big amount down both lock money into the car that you can't get back — the same trap in two forms. When Downly steers you toward the right mileage tier and little or nothing down, your payment fits your real life and your cash stays in your pocket, ready for whatever you'd rather do with it than pre-pay for miles you may never drive.