decision
Business Credit Card: Rewards vs. Interest Calculator (2026)
The right business credit card depends on one question: do you carry a balance? If you pay in full every month, a flat-rate cashback card puts money back on every dollar you spend. If you carry a balance, interest charges can erode those rewards entirely — and a 0%-intro-APR card saves more than the cashback would have earned. This calculator runs the comparison for your specific spend and payment pattern.
Educational estimate based on the inputs you entered — not financial, legal, or tax advice. Verify against your specific situation before acting on this output.
How it works
Methodology
Inputs
- Monthly business spend
- Average monthly spend charged to the card across all categories.
- Cashback rate
- Flat reward rate offered by the cashback card (e.g., 1.5% = 0.015). Typical range: 1.5%–2%.
- Balance behavior
- Pay in full monthly (no interest) vs. carry a balance (interest applies).
- Average monthly balance carried
- Average balance outstanding at month-end if carrying a balance.
- Standard APR after intro period
- Regular purchase APR that applies after 0%-intro ends.
- Intro period length
- Months at 0% promotional APR (typically 6–21 months for business cards).
Formula
Annual rewards = monthly_spend × 12 × reward_rate If carrying a balance: Interest on rewards card = avg_balance × standard_APR (all 12 months) Interest on intro-APR card = avg_balance × (standard_APR/12) × post_intro_months Interest saved = interest_on_rewards − interest_on_intro Net benefit (rewards card) = annual_rewards − annual_interest Net benefit (intro-APR card) = interest_saved (no rewards modeled) Verdict: whichever net benefit is higher — or neutral if gap < $50
Assumptions
- Intro-APR card earns no cashback (conservative assumption — add any rewards manually if applicable).
- Annual fees are not included — subtract any annual fee from the winning card's net benefit.
- Interest is computed on an annual basis using the average balance; daily compounding raises actual interest slightly.
- Spend volume is constant across all 12 months.
Worked examples
Pays in full — rewards card wins clearly
- Monthly spend
- $5,000
- Reward rate
- 1.5%
- Balance
- Pay in full
Annual cashback: $900. Interest: $0. Rewards card wins — the math is simple when you pay in full.
Carries balance — 0%-intro-APR card wins
- Monthly spend
- $3,000
- Average balance
- $2,500
- Standard APR
- 24%
- Intro period
- 12 months
Annual cashback: $540. Annual interest (rewards card): $600. Net rewards card: −$60. Intro-APR card saves ~$600 in interest during the 12-month window. Intro-APR wins by $660.
Carries small balance — rewards card still wins
- Monthly spend
- $8,000
- Average balance
- $500
- Standard APR
- 24%
- Intro period
- 12 months
Annual cashback: $1,440. Annual interest (rewards card): $120. Net rewards: $1,320. Interest saved by intro-APR: $120. Rewards card wins by $1,200.
Frequently asked
Questions readers ask
When does a 0%-intro-APR card beat a rewards card for a business? +
When you carry a balance. A $3,000 monthly average balance at 24% APR costs $720/year in interest. A 1.5% cashback card on $3,000/month of spend earns $540/year — you're net negative $180 before fees. A 0%-intro card with a 12-month window saves the full $720 of interest during that period. After the intro window, you're back on standard APR — so the strategy works only if you pay down the balance before the intro period ends.
What is a typical business cashback rate? +
Flat-rate business cashback cards typically pay 1.5%–2% on all purchases. Category-specific cards (office supplies, telecom, gas, travel) can pay 3%–5% in bonus categories with 1%–1.5% on everything else. For most SMBs with diversified spend, a flat 1.5% card is simpler to model and often earns more in total because most spend doesn't fall in bonus categories.
Does a 0%-intro-APR card offer rewards too? +
Rarely at the same rate as a dedicated rewards card. Some intro-APR cards offer modest signup bonuses or 1% cashback, but the 0% promotional rate is the primary value proposition. This calculator treats the intro-APR card as rewards-free to show the clearest comparison — if your specific card offers both, add the rewards to the intro-APR net benefit manually.
What happens after the 0%-intro-APR period ends? +
Standard purchase APR applies to any remaining balance — typically 21%–29% for business cards. This is the risk of the intro-APR strategy: if you don't pay down the balance before the intro period ends, you're exposed to a high rate on whatever remains. The calculator models this by showing post-intro interest as part of the annual cost comparison.
This tool is for educational purposes only and is not financial, legal, or tax advice. Final terms and eligibility depend on lender underwriting; consult a tax professional before acting on tax-tool output. ClearValue Lending is a funding platform.
https://clearvaluelending.com/tools/business-credit-card-rewards-vs-interest-calculator