What Is a Money Factor and Why It Matters for Your Lease

What Money Factor Actually Is

Money Factor (MF) is the finance charge component of a lease payment, expressed as a small decimal — typically between 0.00050 and 0.00300. To convert it to an approximate APR, multiply by 2,400.

For example: a money factor of 0.00175 × 2,400 = 4.2% APR. A money factor of 0.00250 × 2,400 = 6.0% APR. The difference between these two on a $45,000 vehicle lease over 36 months is approximately $50–$80 per month — or $1,800–$2,880 over the lease term.

How Dealers Mark Up the Money Factor

Manufacturers set a "base" or "buy" money factor for each vehicle model each month as part of their lease program. This number is published to dealers but not typically disclosed to consumers. Dealers are permitted to mark up the money factor above the buy rate, and the additional markup becomes additional profit retained by the dealer.

The maximum permitted markup varies by manufacturer and lender program — typically between 0.00050 and 0.00100 above the base rate. On a $50,000 vehicle, a 0.00075 markup adds approximately $37.50 per month, or $1,350 over a 36-month lease.

You are legally entitled to know the money factor being applied to your lease. Ask for it explicitly. If the F&I manager is reluctant to disclose it, that reluctance is diagnostic.

Residual Value — The Other Number That Matters

Residual value is the manufacturer's estimate of what the vehicle will be worth at lease end, expressed as a percentage of MSRP. Along with money factor, it is the second major determinant of your monthly payment.

A higher residual value means less depreciation to finance, which means a lower monthly payment. Residual values are set by the manufacturer's captive finance arm and generally cannot be negotiated. However, they can be verified. Published residual values for current model year vehicles are available through automotive data services.

Dealers occasionally make residual value errors — quoting a lower residual than the published program, which inflates your payment. Verify the residual for your specific trim, mileage allowance, and lease term before signing.

The Full Lease Payment Formula

Monthly lease payment = Depreciation charge + Finance charge + Tax

Depreciation charge = (Adjusted cap cost − Residual value) ÷ Term Finance charge = (Adjusted cap cost + Residual value) × Money factor

Adjusted cap cost = Negotiated selling price − Cap cost reductions (down payment, trade-in equity, rebates)

This formula means you have two things to negotiate on every lease: the cap cost (selling price) and the money factor. Both are negotiable. Both directly affect your payment. Residual value is not negotiable and should match the published program exactly.