Money Factor Calculator
Convert auto lease money factor to APR (and back). Dealers express lease interest as a tiny decimal, use this calculator to see the actual annual percentage rate you're paying.
Reviewed & updated for 2026 by Rakesh Choudhary, PhD · How we calculate
Money factor to APR reference
| Money Factor | APR | Tier |
|---|---|---|
| 0.00042 | 1.00% | Excellent (subvented) |
| 0.00100 | 2.40% | Excellent |
| 0.00150 | 3.60% | Good |
| 0.00200 | 4.80% | Average |
| 0.00250 | 6.00% | Average |
| 0.00300 | 7.20% | Poor |
| 0.00400 | 9.60% | Poor |
Why dealers use money factor instead of APR
The simple answer: 0.00150 looks much smaller than 3.6%. Money factor is the same interest rate, presented in a way that makes negotiating harder for the customer. Federal law requires dealers to disclose APR on financed purchases, but lease contracts are governed by the Consumer Leasing Act, which has weaker disclosure rules. Money factor is what fills that gap.
The conversion is just money factor × 2400 = APR%. The "2400" looks arbitrary but is straightforward: money factor is monthly interest expressed as a decimal of the lease's average balance, so multiply by 24 to annualize the figure, then by 100 to turn it into a percentage. 24 × 100 = 2400.
When you walk into a dealership, ask the F&I office for both the money factor and the buy rate (the rate from the captive finance arm) in writing on the lease worksheet. If they refuse, that's a red flag. Brand financing arms — Toyota Financial Services, Honda Financial, BMW Financial — publish baseline money factors monthly. Dealers can mark them up, but you have leverage if you know the buy rate.
How money factor affects your lease payment
A monthly lease payment has two parts. The depreciation portion is fixed by the price and residual value. The finance portion is controlled by the money factor. Increasing the money factor adds money to your payment with no benefit to you.
The finance charge each month equals (capitalized cost + residual value) × money factor. On a $42,000 car with a $25,000 residual:
| Money factor | APR | Monthly finance charge | 36-month interest |
|---|---|---|---|
| 0.00050 | 1.20% | $33.50 | $1,206 |
| 0.00100 | 2.40% | $67.00 | $2,412 |
| 0.00200 | 4.80% | $134.00 | $4,824 |
| 0.00300 | 7.20% | $201.00 | $7,236 |
| 0.00400 | 9.60% | $268.00 | $9,648 |
Going from a 0.00100 to a 0.00200 money factor — what looks like a tiny decimal change — costs you over $2,400 in extra interest on a 36-month lease. This is the single biggest lever dealers use to inflate lease profitability, and it never appears as a line item on the contract.
Three negotiation tactics that actually work
Most lease customers focus on the monthly payment, which gives dealers room to manipulate the other variables. To protect your wallet, negotiate each lease component separately:
- Ask for the manufacturer buy rate. Sites like Edmunds and LeaseHackr publish current captive rates by brand and credit tier each month. If Honda Financial is offering 0.00120 on a CR-V this month and your dealer quotes you 0.00180, that's a $60/month markup. Tier 1 credit holders can usually negotiate the dealer down to the buy rate.
- Don't accept "the bank sets the money factor." Captive finance arms set a wholesale rate. Dealers add reserve, which is their profit. Asking them to "match the buy rate" is asking them to forfeit reserve — they usually will when pressed, especially mid-month or end-of-quarter when sales targets matter.
- Use multiple security deposits (MSDs). Many captive lenders (BMW, Mercedes, Audi, Acura) let you put down up to 9 or 10 refundable security deposits, with each one shaving the money factor by 0.00005 to 0.00010. Ten MSDs can cut a 0.00200 MF to 0.00100, saving thousands in interest. You get the deposits back at lease-end.
If the dealer won't negotiate the money factor, walk away. Negotiating sale price down by $1,000 while accepting a marked-up money factor of 0.00050 over buy rate is a net loss on a 36-month lease.
FAQs
What is money factor?
Money factor is the interest rate on a car lease, expressed as a tiny decimal (e.g., 0.00125) instead of a percentage. Dealers use this format to obscure the actual interest rate from consumers. Convert to APR by multiplying by 2,400. Money factor 0.00125 = 3.00% APR. Money factor 0.00250 = 6.00% APR. Always demand the money factor in writing during lease negotiations.
How do I convert money factor to APR?
APR = money factor × 2,400. Examples: MF 0.00100 = 2.40% APR. MF 0.00150 = 3.60% APR. MF 0.00200 = 4.80% APR. MF 0.00250 = 6.00% APR. The 2,400 multiplier comes from the math: money factor is monthly interest rate / 24, so MF × 24 = monthly rate, × 12 months = annual rate, × 100 = percent. Combined: × 2,400.
What's a good money factor?
Below 0.00100 (2.4% APR) is excellent, usually only available through manufacturer subvented (subsidized) lease programs. 0.00100-0.00200 (2.4%-4.8%) is good for tier 1 credit (720+). 0.00200-0.00300 (4.8%-7.2%) is average. Above 0.00300 (7.2%+) is poor, consider financing instead. Money factor varies based on credit tier, lease length, and current rates.
Is money factor the same as APR?
Yes, just expressed differently. Money factor is a decimal (0.00125), APR is a percentage (3.00%). The math is equivalent, you're paying the same interest cost. Dealers prefer money factor because it sounds smaller, but you should always think in APR terms when comparing to traditional financing.
Can I negotiate the money factor?
Yes, money factor is one of the three main lease negotiation levers (along with sale price and residual value). With strong credit and lease shopping, you can often negotiate 0.0005-0.0010 reduction (saving 1.2-2.4% APR). Always ask for the 'buy rate' (the rate the leasing company offers you) vs. the 'sell rate' (what the dealer is quoting, often marked up).
Is the money factor tax deductible?
Not directly, but if the vehicle is used for business, you can deduct the lease payments (which include the money factor cost) on Schedule C in proportion to business use. The IRS may require you to add back an 'inclusion amount' (a small adjustment) for luxury vehicles.
How do I calculate lease interest paid?
Monthly lease interest = (capitalized cost + residual value) × money factor. For a $40,000 car with $25,000 residual and MF 0.00150: monthly interest = ($40,000 + $25,000) × 0.00150 = $97.50. Over a 36-month lease: ~$3,510 in interest. This is on top of the depreciation portion of your monthly payment.