Money Factor Explained

What the number means

A money factor is a small decimal, typically something like 0.00250. To convert it to an annual percentage rate, multiply by 2,400. So 0.00250 is equivalent to 6% APR, and 0.00125 is 3%.

The 2,400 comes from the arithmetic of how the rent charge is calculated: 2 for the averaging of the capitalized cost and residual, and 1,200 to convert a monthly rate to an annual percentage. You do not need to derive it. You need to remember it.

Be alert to formatting. Some dealers quote the money factor multiplied by 1,000, so you may hear 'two and a half' meaning 0.00250. Others quote it as a whole number, '25'. Always confirm which format you are being given, because the difference between 0.0025 and 0.025 is the difference between 6% and 60%.

Money factor × 2,400 = APR. APR ÷ 2,400 = money factor. This is the only conversion you need.

Why it costs more than the equivalent loan rate

Here is where leases surprise people. On a car loan, interest is charged on the declining balance — as you pay down principal, the interest portion shrinks. On a lease, the rent charge is calculated on the capitalized cost plus the residual value, and that figure does not decline over the term.

The reason is that the bank owns the entire car for the whole term, not just the part you consume. It is financing the full asset, so it charges on the full asset. In practice this means a 6% money factor and a 6% loan APR are not equivalent costs, even though they convert to the same number.

The effect scales with the residual. A car with a high residual has more capital sitting idle in the bank's hands, so more of your payment goes to rent charge. This produces the counterintuitive result that strong-retention cars have a larger share of their payment going to interest than weak-retention cars do — even though the total payment is lower.

The dealer markup

The leasing bank sets a base money factor, usually called the buy rate. The dealer is permitted to add to it, and the difference is dealer profit paid over the life of the lease. This is the lease equivalent of a marked-up loan rate.

Markups are typically capped by the bank at somewhere between 0.0004 and 0.0010 — roughly 1% to 2.4% of APR. That sounds small. On a $300,000 car with a 60% residual, a 0.0005 markup adds about $240 a month, or over $8,600 across a 36-month lease. It is one of the most profitable and least visible parts of the transaction.

The remedy is simply to ask. 'What is the buy rate from the bank, and what money factor is on my contract?' A dealer who will not answer that question directly has told you the answer.

Subsidized money factors, and how to spot one

Manufacturers frequently subsidize the money factor to move inventory. A subvented rate can go far below any market rate — sometimes to 0.00001, effectively zero interest — because the manufacturer is paying the difference as a marketing expense.

These programs are published monthly, vary by region, and apply to specific models and terms. They are the single largest driver of whether leasing a particular car is a good idea in a particular month. A model that is expensive to lease in March may be cheap in September when the manufacturer needs to clear inventory ahead of a model change.

Subsidies are common on mainstream luxury brands and rare on true exotics. If you are looking at a Mercedes, BMW, or Porsche, it is worth checking whether a program is running before you commit. If you are looking at a Ferrari, assume there is none.

Multiple security deposits

Some captive lenders — historically BMW and Audi among others — offer a mechanism called multiple security deposits, or MSDs. You place refundable deposits with the bank, and in exchange the money factor is reduced by a set amount per deposit.

The deposits are fully refundable at lease end, so the return on the capital is effectively risk-free apart from the credit risk of the lender itself. When a program is available, the implied yield is frequently better than any comparable low-risk investment.

Availability varies by lender and changes without much announcement. It is worth asking about explicitly, because it is rarely offered unprompted.

Putting a number on it

Run your quoted money factor and the bank's buy rate through a lease calculator and compare the two monthly payments. The difference, multiplied by the term, is what the markup is costing you. Having that figure in front of you changes the conversation from an abstract argument about fairness into a specific number you are asking to have removed.

The same exercise is worth doing across terms. Because the rent charge is calculated on the capitalized cost plus residual, and the residual falls as the term lengthens, the interest portion of a 48-month lease behaves differently than a 36-month one. It is not always intuitive which is cheaper in total.