Dealer vs Bank Financing Calculator
Build a transparent dealer vs bank financing scenario from values you control.
Verify this calculatorVerified
See what the result uses—and what it cannot know.
Sumvoro calculates deterministically from the visible inputs. It does not invent lender terms, local rules, market values, medical facts, or professional judgments.
- 1 · InputsCheck every entered value against the latest statement, quote, measurement, or official source.
- 2 · Formula
Each adjusted amount financed is amortized; total scheduled costs determine the modeled advantage. - 3 · SensitivityUse Insights to run a lower and higher case. If the conclusion changes easily, collect better information or leave more margin.
- 4 · ScopeThis tool is maintained and covered by automated calculation tests. Provider timing, rounding, and omitted facts can still change a real-world result.
- Formula release
- 2026.10-r4
- Release date
- October 10, 2026
- Review status
- Verified
- Source review
- October 10, 2026
Dealer vs Bank Financing calculator
A lower dealer APR can lose its advantage when an incentive is forfeited. Compare the modeled total cost, not just the monthly payment.
- Use the same vehicle and term for an equal comparison.
- Confirm whether the quoted price already includes the rebate; do not count it twice.
- This model excludes tax, trade, insurance and optional products.
Optional readingLearn how this calculator works
How the dealer vs bank financing calculator works
Compare dealer and outside auto financing including rebates and fees.
Each adjusted amount financed is amortized; total scheduled costs determine the modeled advantage.
Read our calculation methodology and limitations.
Example
Start with the example, then replace each field with figures from your quote, statement, budget, or plan.
Is the lower dealer rate worth giving up a rebate?
- Vehicle price
- $40,000
- Down payment
- $5,000
- Dealer APR
- 4.9 %
- Dealer term
- 60 months
- Rebate lost
- $2,500
- Outside-lender APR
- 6.25 %
- Outside term
- 60 months
- Outside fees
- $0
- Outside financing advantage
- $1,513.82
- Dealer payment
- $705.95
- Outside payment
- $680.72
- Lower modeled total cost
- $45,843.45
Compare both offers over the same term. This simplified model excludes tax, trade, add-ons and insurance; use the buyer worksheet for the complete deal.
These are fictional, editable assumptions—not market quotes or personal advice.
What affects the result
- Use documented current figures when available.
- Test multiple scenarios before deciding.
- Verify legal, tax, and contract details with the appropriate source.
Helpful guides
Frequently asked questions
What should I enter?
Use the field guidance and current documents wherever possible.
Can I rely on this result?
Use it as a deterministic planning estimate, then confirm important decisions with official sources and qualified professionals.