The Diamond DA40 is a composite four-seat single with one of the best safety records in general aviation and, in its NG form, a Jet-A-burning diesel engine that sidesteps the long-term avgas question. It's a favorite of safety-minded owners and flight schools alike. Financing a DA40 is straightforward, but the diesel-versus-Lycoming choice and the composite airframe are worth understanding. Here's what a DA40 costs in 2026 and how to finance one.
Key takeaways
- Two engine choices. The DA40 NG runs an Austro Jet-A diesel (~5–6 gph); earlier DA40s use a Lycoming avgas engine.
- Strong values, easy financing. Used DA40s run roughly $180,000 to $500,000; a new DA40 NG is generally high five to low six figures.
- Safety record helps insurance. The DA40's accident record is a plus with underwriters.
- Diesel economics are a real angle. Jet-A availability and lower fuel burn can lower operating cost and hedge the avgas transition.
- Rates are illustrative. Well-qualified piston borrowers are generally in the mid-to-upper 6% range in early 2026. Jaken Aviation is a brokerage, not a lender.
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What a Diamond DA40 Costs in 2026
DA40 values split along the engine choice and avionics generation. The diesel NG commands a premium and holds value well; older Lycoming-powered DA40s are a value entry into a modern composite single.
| Model / vintage | Typical price range | What drives it |
|---|---|---|
| New DA40 NG (diesel) | ~$550,000–$680,000 | Factory warranty, G1000 NXi, Austro diesel |
| Used DA40 NG (2010s) | ~$300,000–$500,000 | Diesel, engine/gearbox time, avionics |
| DA40 XLS / CS (Lycoming, 2000s) | ~$180,000–$350,000 | Avgas engine, panel, condition |
Illustrative Financing Rates & Terms
A DA40 finances on piston-single fundamentals; the composite airframe and diesel drivetrain make records and specialist inspection important. These ranges are illustrative for early 2026, not offers; see our aircraft loan rates guide for the full picture.
| Buyer / aircraft profile | Credit tier | Illustrative APR | Typical down | Typical term |
|---|---|---|---|---|
| New DA40 NG | Strong (720+) | mid-to-upper 6% | 15–20% | up to 20 yrs |
| Used DA40 NG | Strong (720+) | upper 6% – 7.5% | 20% | 15–20 yrs |
| DA40 XLS / CS (Lycoming) | Good (680–719) | 7% – 8% | 20% | 15 yrs |
| Any DA40 | Challenged (<680) | 8% – 12% | 25%+ | 10–15 yrs |
Diesel vs. Avgas & the Composite Airframe
The DA40's two distinctive features shape ownership and, indirectly, the loan:
- The NG's Austro diesel burns Jet-A at roughly 5–6 gph — dramatically less fuel cost than a comparable avgas single, and insulated from the eventual leaded-avgas transition. The trade-off is a scheduled gearbox and engine replacement interval (a TBR, time-between-replacement, rather than a traditional overhaul), which you should understand and reserve for.
- Lycoming-powered DA40s use familiar avgas maintenance and are a lower-cost entry, at higher fuel burn.
- Composite airframe. Diamond's composite structure is durable and corrosion-resistant, but it rewards a Diamond-experienced pre-buy and shop.
- Insurance. The DA40's strong safety record is a genuine plus with underwriters, which can help premiums.
Tip: on a diesel NG, verify the engine/gearbox time and remaining life carefully in the pre-buy — the replacement schedule is a real cost to factor into both price and financing.
Worked Monthly Payment Examples
Illustrative principal-and-interest only, using the rates above; excludes taxes, insurance, and closing costs. Model your own numbers with our aircraft loan calculator.
| Scenario | Price | Down | Financed | Rate / term | Est. monthly (P&I) |
|---|---|---|---|---|---|
| New DA40 NG, strong credit | $620,000 | 15% ($93,000) | $527,000 | 6.5% / 20 yr | ~$3,930 |
| 2016 DA40 NG, strong credit | $420,000 | 20% ($84,000) | $336,000 | 7.0% / 20 yr | ~$2,605 |
| 2006 DA40 (Lycoming), good credit | $250,000 | 20% ($50,000) | $200,000 | 7.5% / 15 yr | ~$1,855 |
Total Cost of Ownership
The DA40 — especially the diesel — is economical to run, but budget for:
- Fuel: the diesel NG burns roughly 5–6 gph of Jet-A — a major saving over a comparable avgas single; Lycoming versions burn more avgas.
- Engine/gearbox reserve: on the NG, reserve toward the scheduled replacement (TBR) rather than a traditional overhaul.
- Insurance: often favorable thanks to the safety record; higher for very low-time pilots.
- Annual & maintenance: use a Diamond-savvy shop for composite and diesel work.
- Hangar or tie-down: regional and modest for a light single.
For a cross-model view, see our aircraft ownership cost guide.
Rates, terms, and prices in this article are illustrative examples for the 2026 market and are not offers of credit. Jaken Aviation is a licensed aircraft financing brokerage — a division of Jaken Finance Group — and does not make loan decisions. All financing is subject to lender approval.
Frequently Asked Questions
Does the diesel DA40 NG finance differently?
No, it finances on standard piston-single terms. The diesel's difference shows up in ownership: much lower fuel burn but a scheduled engine/gearbox replacement (TBR) to reserve for. Verify engine time carefully in the pre-buy.
How much do I need to put down on a DA40?
For a well-qualified buyer, 15-20% down is common on newer NGs; 20% is typical on older Lycoming DA40s. These are typical ranges, not guarantees.
Is a diesel airplane a good hedge against avgas going away?
It's a reasonable consideration. The Austro diesel runs on widely available Jet-A and isn't dependent on leaded avgas, which some buyers value as a long-term hedge. Weigh that against the engine's replacement schedule.
Does the DA40's safety record help my insurance?
It can. Underwriters price on the airplane and the pilot, and the DA40's strong accident record is a genuine positive, though your own experience still drives the premium.
Are the rates in this guide guaranteed?
No. Every figure is illustrative for planning only. Jaken Aviation is a brokerage, not a lender; your actual offer comes from a lender after a full application and is subject to credit approval.
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