How to Calculate Cashback: Advertised vs Actual
Cashback is usually calculated as a percentage of spending, but the advertised "up to X%" almost always comes with conditions. The real rate depends on three constraints: a cashback cap, specific merchant categories, and per-transaction limits. Take a typical example: a card advertises "up to 10% cashback on online shopping." The fine print says the 10% applies only to the first 1000 yuan of monthly spending; anything beyond earns 0.5%. If you spend 5000 yuan a month online, your real cashback is 1000×10% + 4000×0.5% = 100 + 20 = 120 yuan, a real rate of only 2.4% — far below the advertised 10%. So when comparing cashback cards, run the numbers on your own spending mix. Multiply each category's cashback rate by your monthly spend in that category, add them up, and divide by total spending. That gives your true cashback rate. Working it out line by line with a [percentage calculator](https://calc20.top/en/percentage) beats trusting the poster.How to Value Points: What 10,000 Points Are Worth
Points are where people get confused, because banks price them in wildly different ways. The consistent yardstick is: what can 10,000 points actually buy in cash terms? There are four common redemption paths: statement credit, merchandise, airline miles and cashback vouchers. Statement credit usually values a few hundred points per yuan, so 10,000 points are worth 3-10 yuan. Miles are often the highest-value path — some cards convert 10,000 points into 500-1000 miles worth 10-30 yuan after conversion. Merchandise is the trap: many gifts are priced far above their real value, sometimes worth only half. The same 100,000 points might buy 300-1000 yuan of statement credit but 1000-3000 yuan of value via miles — a threefold gap depending on the path. Before choosing a card or spending points, find out the bank's main redemption routes and value ranges, so your points do not quietly depreciate in your wallet.Card Selection: Balancing Annual Fees and Returns
A card's net return = cashback + point value − annual fee − potential interest cost. The first two are gains, the last two are costs. Many premium cards boast rich perks but carry annual fees over a thousand yuan; if you do not use the perks, you lose. Three principles guide card selection. First, know your main spending categories: heavy online shoppers want an online cashback card, drivers want fuel cashback — never pay an annual fee for perks you will not use. Second, value every perk of a fee-based card line by line; if an 800-yuan annual fee buys lounge access and airport transfers you never use, the card is a liability. Third, never overspend to chase cashback — credit card interest and late fees will instantly swallow every yuan of rewards, and revolving interest compounds alarmingly fast once it starts rolling. Once you convert cashback and point value into a consistent number, subtract the annual fee and likely interest, and you can objectively judge whether a card is worth carrying. A credit card is a tool: used well it produces positive returns, used poorly it only makes you work for the bank. To see how fast revolving interest compounds, plug your balance and monthly rate into the [compound interest calculator](https://calc20.top/en/compound-interest) — the result will surprise you.FAQ
Q1: Are cashback and points the same thing?
No. Cashback returns a direct percentage of spending as cash or statement credit with clear value. Points are virtual credits accumulated from spending that must be converted through redemption routes, so their value depends on how you redeem them.
Q2: Do points expire?
Most banks set an expiry of 1-3 years, while some premium cards keep points permanently valid. Before expiry, actively redeem for high-value merchandise or miles to avoid losing your balance to zero.
Q3: Is the highest cashback card always the best?
Not necessarily. High cashback usually comes with category limits, caps or hefty annual fees. What matters is the net return — real cashback minus costs — not the advertised number.
Q4: Is it worth spending more just to earn cashback?
No. Cashback rates are typically 1%-5%, but if overspending pushes you into minimum payments or installments, revolving interest can run 15%-18% annually — far more than any cashback you earn. It is a losing trade.