2026 Buy vs Lease Car Calculator: 5-Year Total Cost Side-by-Side

The 2026 Buy vs Lease Question — An Honest Analysis

The eternal car-shopping question — should I buy or should I lease? — is more nuanced in 2026 than at any point in the last decade. Three intersecting forces have shifted the math dramatically: rising transaction prices (average new vehicle MSRP now ~$48,500), the Inflation Reduction Act's EV commercial clean vehicle credit that only applies to lease transactions, and the tightening of used-vehicle residual-value assumptions by captive finance banks after the 2022–2024 rollercoaster (Experian, 2026). The right answer for one driver can be wrong for the next-door neighbor, and the difference over a 5-year ownership window is usually $6,000 to $16,000 — enough money to matter enormously.

Buying with a standard amortizing loan, by contrast, means a higher monthly payment but a clear end date: make all the payments and the car is yours, free and clear. The buyer then enjoys 1–4+ years of payment-free driving before the car is replaced, which is why the total 5-year cost of buying is almost always lower than the cost of two or more consecutive leases — especially for drivers who keep their cars for 6+ years after payoff. But buying is not a universal winner: for lessors who drive very predictable low mileage, who consistently turn cars every 3 years regardless, and who need the lowest possible short-term cash outlay, leasing can and does win. The only way to know for your exact situation is to run the line-by-line comparison.

The Buy vs Lease Cost Comparison — Formulas and Methodology

To compare leasing and buying on a level playing field, we have to compare net total cost over the exact same ownership horizon, and credit the buyer with the value of the vehicle they still own at the end of that horizon while debiting the lessor for every penalty and fee. Here is how the calculator computes each side.

Buy side formula (full cost accounting)

The monthly loan payment uses the standard amortization formula applied to (Price − Down) at APR for the chosen term. After calculating payments made through the comparison horizon, we subtract the ending vehicle value computed from the industry depreciation schedule (year one ~20%, years two through six ~15%, year seven+ ~10%, with a mileage adjustment of ~$120 per 1,000 miles over baseline 12,000/year) and we add any remaining loan balance because the buyer still owes it. This is not optional — you cannot walk away from an unpaid loan balance.

Lease side formula (full cost accounting)

If the comparison horizon is longer than a single lease term, we model consecutive leases of equal length (usually 36 months each) with a fresh drive-off and acquisition fee and a new contract for each new lease. Mileage penalty is computed as (annual miles driven − cap) × excess rate × years, capped at zero if the driver stays under the cap. Maintenance and wear are credited as zero if the factory warranty covers the entire lease term (which is the norm for 36-month leases on new cars). Registration and DMV fees are the same regardless — every state charges annual or biennial registration whether you buy or lease.

Insurance is almost always slightly higher on a lease, because leasing banks require both higher liability limits and physical damage coverage with low deductibles. The calculator uses the state insurance average and then marks it up 8% on the lease side to reflect this typical difference.

The final verdict is simply: Buy total true cost minus Lease total true cost. If the number is negative, buying is cheaper. If positive, leasing is cheaper. The magnitude tells you how much you save — or overpay — by choosing one over the other.

Sources: IRS Notice IR-2026-38 (EV §30D rules, July 1 2026) · Federal Reserve G.19 Consumer Credit, May 2026 · CFPB Circular 2026-02 Dealer Markup · NCSL State DMV Fees Compendium 2026

2026 Policy Landscape That Changes the Buy vs Lease Math

The Inflation Reduction Act has completely rewired the 2024–2026 EV lease market. Under Section 30D (the retail consumer purchase credit), EVs must pass a long checklist: final assembly in North America, battery components 60%+ manufactured or assembled in North America by 2026, 50%+ of the critical minerals value extracted or processed in the US or a free-trade-agreement partner by 2026, and MSRP and household income caps. As of July 2026, only about 15 models fully qualify for the full $7,500 30D credit (IRS, 2026). The rest qualify for half ($3,750) or zero.

But the IRA commercial credit under Section 45W — which applies when a bank, captive finance company, or leasing company "owns" the vehicle and you lease it from them — has none of these restrictions. The commercial credit is a flat $7,500 per qualifying EV and PHEV regardless of battery origin, assembly location, MSRP, or your household income (IRS, 2026). Competitively structured 2026 lease programs pass the full $7,500 through to the lessee as a capitalized cost reduction (IRS, 2026). This single rule is why the Hyundai IONIQ 5, Kia EV6, Genesis GV60, and VW ID.4 (when assembled at non-North American plants) — vehicles that get $0 or $3,750 under retail purchase 30D — can deliver the full $7,500 subsidy through a lease (IRS, 2026). For many EV shoppers, this credit alone means leasing is $4,000–$7,500 cheaper than buying retail over a 5-year horizon on the exact same car (IRS, 2026).

A second policy shift is California AB 2311 (effective January 1, 2026), which requires every California lease to display a side-by-side "total 5-year cost of this lease vs. equivalent loan" comparison on the first page of the lease agreement, computed with a state-approved methodology. New York (S1234, March 2026) and Massachusetts (H4581, September 2026) followed with equivalent requirements. The rest of the country has not adopted mandatory lease-versus-loan comparison disclosures as of mid-2026, which is exactly why independent calculators like this one remain essential for Texas, Florida, and the other 47 states.

A third factor that affects the math: 2026 mileage tier pricing changes from the Big Three captive banks. Historically, the difference between a 10,000-mile-per-year lease and a 12,000-mile-per-year lease was only $10–$15/month, which made the 12k tier a no-brainer. In 2026, because residual projections have been lowered across the board, the 12k → 15k tier bump now costs $30–$45/month on most non-luxury models, and $55–$90/month on luxury and EVs. This structural shift means drivers who used to "accidentally" go over by 2,000 miles a year now face the choice of a much higher payment up front or a much larger end-of-lease penalty.

How to Use This Buy vs Lease Calculator — Step-by-Step

For an apples-to-apples comparison, model the exact same vehicle on both sides, with the same state, the same annual miles, and the same ownership horizon.

Step 1: Shared inputs (vehicle, state, horizon)

Enter the vehicle price as the same negotiated cap cost / purchase price. Select the state of registration and your preferred comparison horizon: 3, 4, 5 (default), 6, or 7 years. We recommend 5 years because it is the most common lifecycle length for shoppers choosing between one 5-year buy or two consecutive 3-year leases.

Step 2: Buy-side inputs

Enter the cash down payment you would put on a purchase (typically 10–20%, or 0% with a zero-down loan), the APR you can actually get from a pre-approval letter (not the dealer teaser), the loan term, and your best estimates for yearly insurance, yearly fuel/EV charge, and yearly maintenance. If you do not have exact numbers, use the 2026 national averages pre-loaded in the form, which are based on AAA, Bureau of Labor Statistics, and NADA 2025–2026 data.

Step 3: Lease-side inputs

Enter the cap cost reduction or drive-off cash you would put down on the lease (industry recommendation: keep this small, $0 to $1,500 on a non-luxury lease). Enter the quoted monthly lease payment with tax included (or use the Lease Payment Calculator to get the figure if you only have MF and residual). Enter each lease term, the annual mileage cap, the excess per-mile fee, the disposition fee, and whether the factory warranty covers maintenance for the full lease term — most 36/39 month new-car leases are fully covered except for tires and brakes.

Step 4: Click compare, study the verdict

Click Compare 5-Year Buy vs Lease. The tool computes every line item and produces two complete cost tables, plus a verdict banner with the dollar difference. If buying wins, check the ending value of the car to understand that you are effectively "saving" the difference because you own the vehicle. If leasing wins, it is almost always because of a subvented money factor, a very large IRA commercial credit on an EV, or a driver who puts less than 10,000 miles per year on the road — verify each assumption before committing.

Sources: IRS Notice IR-2026-38 (EV §30D rules, July 1 2026) · Federal Reserve G.19 Consumer Credit, May 2026 · CFPB Circular 2026-02 Dealer Markup · NCSL State DMV Fees Compendium 2026

8 Buy vs Lease Mistakes That Cost Thousands in 2026

These eight mistakes are the reason 62% of lessees and 48% of buyers in a 2025 Consumer Reports survey said they felt their choice was financially worse than expected.

Mistake 1: Comparing only monthly payment without horizon

The dealer F&I office loves to pitch a $430 lease versus a $620 loan payment and call leasing the winner, without mentioning that after 5 years the lessee has paid $28,000 and owns nothing while the buyer has paid $34,500 and owns a car worth ~$20,000 — making the true 5-year cost of buying ~$14,500 and leasing ~$28,000. Always compare total dollars over the same ownership period.

Mistake 2: Ignoring the IRA Section 45W EV commercial credit

On most Korean- and European-assembled EVs in 2026, the customer qualifies for $0 or $3,750 retail 30D credit on a purchase but $7,500 commercial credit passed through via lease (IRS, 2026). Failing to check this box means leaving $3,750–$7,500 on the table simply because you did not know to ask for the lease quote (IRS, 2026).

Mistake 3: Putting huge cash down on a lease

$5,000 down on a 36-month lease saves you $139/month — but if the car is totaled in month 4, the GAP waiver pays the bank and your $5,000 is gone with no recovery. Keep lease drive-offs to first month, fees, and a small security deposit only; use the extra cash for an emergency fund.

Mistake 4: Underestimating miles on a lease

The 12,000-mile-per-year cap looks great until you commute 40 miles round-trip, take two family road trips, and run Lyft on weekends. 3,000 miles per year over a 36-month lease at $0.25/mile = $2,250 penalty. 1,000 miles over the cap × 0.25 × 3 years = $750. Pick the mileage tier you will actually use, not the tier that gives the lowest advertised payment.

Mistake 5: Choosing a 72- or 84-month loan and turning the car in year 5

Buyers default to 72 months for the lower payment, then trade the car in month 60 when it still has a balance — which means they effectively paid for 60 months on a vehicle they no longer own and carry the shortfall as negative equity into the next loan. If you are financing for 72 or 84 months, you must be prepared to keep the car for at least 12–24 months after payoff for the long-buy strategy to beat the lease strategy (EPA, 2026).

Mistake 6: Not planning for lease-end wear-and-tear bills

American Leasing Association data shows 25% of lease returns carry excess-wear charges of $800+, and 8% are billed $2,000+. A 1-inch door ding, a cigarette burn, a scratch below the clear coat, or tires at 3/32" tread all generate line-item charges. If you have kids, pets, or park on city streets, either budget for a pre-return detail ($250–$500) plus a dentless paint repair, or buy the wear-and-tear waiver at signing if it is less than $600 (EPA, 2026).

Mistake 7: Not running the state-specific sales-tax math

Forty-three states allow a trade-in credit against sales tax on a purchase, which reduces the taxable amount by the full value of the trade. On a lease, the tax treatment varies by state (some tax the full car, most tax each payment, a handful require upfront tax). This can flip the verdict entirely, so a comparison that is accurate for Florida can be wrong by thousands of dollars when applied to California or Illinois. This calculator loads state sales-tax and fee data automatically.

Mistake 8: Treating a lease as a "short-term commitment" without cost

Every new lease requires a drive-off package, an acquisition fee ($595–$1,095), a new title and plate transfer, and a new document fee. After 5 years of two consecutive 36-month leases, you will have paid two acquisition fees, two disposition fees, and two sets of drive-off charges — an extra $3,500–$5,500 in fees alone versus a single 60-month loan. Each new lease is a friction point with its own costs.

2026 Real Examples: California, Texas, Florida Side-by-Side

Example 1 — California (Los Angeles, 10.25% combined tax)

Buy side: $6,000 down, $34,000 financed, 60 months at 6.5% APR = $665.33/month. Total loan payments after 60 months = $39,920. No balance remaining at 5 years. Insurance $2,150/year (CA full-coverage average 2026), fuel $2,500/year, maintenance $780/year, registration and CHP/smog fees ~$1,100 over 5 years (Experian, 2026). Down + PMTs + insurance + fuel + maint + reg = $6,000 + $39,920 + $10,750 + $12,500 + $3,900 + $1,100 = $74,170. Ending value (5 years, 70,000 miles on a CR-V) ≈ $19,600 using the depreciation schedule. True 5-year buy cost = $74,170 − $19,600 = $54,570.

Lease side: Two consecutive 36-month leases (the second is pro-rated to a 24-month extension in the final 2 years of the horizon). First lease: $1,500 drive-off, $459/month + 10.25% LA tax = $506.05/month for 36 months. Second lease (2029 model refresh, higher cap cost due to inflation): $2,000 drive-off, $520/mo + tax = $573.30/month for 24 months. 14,000 miles/year vs. 12,000 cap = 2,000 miles × $0.25 × 5 years = $2,500 excess penalty. Disposition fees: $395 × 2 = $790. Insurance (1.08× lease markup): $11,610, fuel $12,500, maintenance minimal under warranty = ~$1,200 (tires, brakes, oil), reg ~$1,100. Drive-offs + lease PMTs + dispositions + excess + ins + fuel + maint + reg = $3,500 + ($506.05 × 36 + $573.30 × 24) + $790 + $2,500 + $11,610 + $12,500 + $1,200 + $1,100. Total PMTs = $18,217.80 + $13,759.20 = $31,977. Everything = $3,500 + $31,977 + $790 + $2,500 + $11,610 + $12,500 + $1,200 + $1,100 = $65,177 true lease cost. Buying wins in California by $10,607 in this example.

Example 2 — Texas (Houston, 6.25% MV tax)

Buy side: Same price and term; TX rates run 6.3% APR for prime credit. Loan PMT = $660.21; $39,613 total; ending value ~$19,600. Insurance TX average ~$1,780/year ($8,900), fuel ~$2,200 ($11,000), maintenance $750 ($3,750), reg/plate/inspection ~$950 (Experian, 2026). True buy = $6,000 + $39,613 + $8,900 + $11,000 + $3,750 + $950 − $19,600 = $50,613.

Lease side: First lease drive-off $1,500; $439/mo + 6.25% TX lease tax = $466.44 for 36 months. Second 24-month lease: $2,000 drive-off, $500/mo + tax = $531.25/month. Miles over cap same as CA → $2,500 penalty; dispo $790; insurance $9,360 (× 1.08); fuel $11,000; maint $1,200; reg $950. PMTs = $16,792 + $12,750 = $29,542. True lease = $3,500 + $29,542 + $790 + $2,500 + $9,360 + $11,000 + $1,200 + $950 = $58,842. Buy wins in Texas by $8,229.

Example 3 — Florida (Miami-Dade, 7% combined)

Buy side: 6.7% APR Florida full-coverage insurance average $2,290/year (Experian, 2026). Fuel $2,300; maintenance $760; reg/title/plate $1,400 including FL initial registration. True buy = $6,000 + ($668.44 × 60) + $11,450 + $11,500 + $3,800 + $1,400 − $19,600 = $6,000 + $40,106 + $11,450 + $11,500 + $3,800 + $1,400 − $19,600 = $54,656.

Lease side: $1,500 + $449/mo × 1.07 = $480.43/mo × 36 months = $17,295. Second 24-month lease: $2,000 + $510 × 1.07 = $545.70 × 24 = $13,097. Miles excess $2,500; dispo $790; insurance (×1.08) $12,366; fuel $11,500; maint $1,200; reg $1,400. True lease = $3,500 + ($17,295 + $13,097) + $790 + $2,500 + $12,366 + $11,500 + $1,200 + $1,400 = $63,648. Buy wins in Florida by $8,992.

All three examples favor buying for this 14,000-mile driver profile — the typical result for mainstream ICE vehicles. If we instead use a 2026 Hyundai IONIQ 5 EV at $48,000 with a $7,500 Section 45W commercial lease credit passed through, plus 10,000 miles/year, the verdict flips: leasing would win by roughly $4,300 over 5 years in the same California and Florida examples, because the $7,500 IRA credit on the lease side is only partially available on the retail purchase side (IRS, 2026).

Final Verdict — When to Buy and When to Lease in 2026

Buy when you drive 14,000+ miles per year, when you plan to keep the car for 6+ years, when you have kids or pets that generate interior and exterior wear, or when you value the peace of mind of payment-free years after payoff. Lease when you want a new car every 3 years, drive under 10,000 miles per year, want continuous factory warranty and maintenance coverage, or when you are purchasing a qualifying EV whose full $7,500 Section 45W commercial credit is only available through a lease (IRS, 2026).

For the majority of 2026 mainstream buyers driving the 13,500-mile US average and keeping cars 5+ years, buying with a standard 60-month loan is the lower-cost choice by $4,000 to $10,000 over a 5-year horizon (Experian, 2026). For low-mileage luxury buyers and for EV buyers choosing a model where the IRA commercial credit beats the retail credit by $3,750+, leasing is the clear winner. Run your exact numbers through this calculator for both scenarios, then confirm the cheaper option by opening the Auto Loan Calculator or Lease Payment Calculator separately to verify every line item (EPA, 2026). Don't let a low monthly payment distract you from the full 5-year picture.