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Making tea at home vs buying tea calculator
Put your days, home cost and buying cost in: 20 days at $1.00 at home is $20.00 a month against $80.00 bought at $4.00, so home saves $60.00 a month.
★ COMPARISONS · FOOD · HOME VS BUYING TEA
Home Tea vs Buying Tea: Save $60 a Month, $720 a Year
On the defaults — 20 days at $1.00 a day at home against $4.00 a day bought — home tea costs $20.00 a month against $80.00 bought, so home saves $60.00 a month and $720.00 a year. This is the TEA version — a daily cup brewed at home against one bought at a counter — the making-smoothies-at-home-vs-buying-smoothies page is the SMOOTHIE version — a daily blended drink made at home against one bought at a counter; the making-breakfast-at-home-vs-buying-breakfast page is the BREAKFAST version — a morning meal made at home against one bought at a counter; and the coffee-shop-vs-home-coffee page is the COFFEE version — a daily coffee brewed at home against one bought at a shop.
What does home saving $60.00 a month mean?
It means that brewing at home costs $1.00 a day — $20.00 over 20 days — against $4.00 a day bought — $80.00 over the same 20 days — so the home habit keeps $60.00 a month and $720.00 a year that the bought habit would have spent. The two totals are the whole story in miniature: the home line is tea, water, and milk only, while the bought line is the counter price with labour, rent, and margin baked in. The part people get wrong is pricing bought tea as the drink alone: a $4.00 tea with a $1.00 extra is $5.00 a day, not $4.00, and a habit priced on the menu figure alone understates the bought total by $20.00 a month over 20 days. The other part people get wrong is the reverse — pricing home tea as free because the leaves were already in the cupboard, which understates the home total by the full ingredients cost of every cup brewed.
Three things to check before you trust the number
Is $1.00 really the home cost, or just the leaves? One dollar is the ingredients cost per day, and it is the figure the home line turns on: the $2.00-home branch saves only $40.00 a month against the $60.00 headline, so a $1.00 ingredients difference is $20.00 a month over 20 days. If your cup uses milk, honey, or a second bag, price each per cup from the pack price, not from memory — an extra guessed at $0.25 that really costs $0.50 halves the apparent saving on its own.
Is $4.00 really the bought price, or the menu price? Four dollars is the full counter price per day, and it is the figure the bought line turns on: the $6.00-buying branch saves $100.00 a month against the $60.00 headline, so a $2.00 price difference is $40.00 a month over 20 days. If you always add milk or always tip, those belong in the buying cost — a habit priced without its regular extras understates the bought total by exactly those extras, every day it runs.
Are 20 days really your tea days? Twenty days is the monthly count, and it is the figure both totals turn on: the 15-day branch saves $45.00 a month against the $60.00 headline, so five fewer tea days are $15.00 a month of saving that never happens. Tea habits vary by month, so average three honest months rather than taking your best month — a cold month priced as a year-round habit overstates the saving by exactly the weeks it did not last.
Worked example
On the defaults: 20 days a month, $1.00 a day at home, $4.00 a day bought.
- Home total per month: 20 × $1.00 is $20.00.
- Buying total per month: 20 × $4.00 is $80.00.
- Monthly saving: $80.00 − $20.00 is $60.00 a month.
- Daily saving: $4.00 − $1.00 is $3.00 a day.
- Yearly saving: $60.00 × 12 is $720.00 — the bought total minus the home total, times 12 for the year.
And the other way: the home cost behind a $60.00 monthly saving is $1.00, and the buying cost behind the same saving is $4.00. The break-even buying cost is $1.00 a day — exactly even with home — so any bought price above $1.00 makes home the cheaper habit, and any bought price below it makes buying cheaper. With 0 days the model honestly shows $0.00 against $0.00 — exactly even — because a habit with no days has no cost on either side.
Every branch, checked
- $2.00 home cost, same days and buying cost: $2.00 home cost, same days and buying cost: Home $40.00 vs buying $80.00 — home saves $40.00 a month.
- $6.00 buying cost, same days and home cost: $6.00 buying cost, same days and home cost: Home $20.00 vs buying $120.00 — home saves $100.00 a month.
- 15 days, same costs: 15 days, same costs: Home $15.00 vs buying $60.00 — home saves $45.00 a month.
- 25 days, same costs: 25 days, same costs: Home $25.00 vs buying $100.00 — home saves $75.00 a month.
The reverses, worked backwards
- Home cost behind $60.00 a month saving: $1.00 a day — at $1.00 a day the figures are Home $20.00 vs buying $80.00 — home saves $60.00 a month.; at the lower neighbor the figures are Home $10.00 vs buying $80.00 — home saves $70.00 a month.; at the upper neighbor the figures are Home $30.00 vs buying $80.00 — home saves $50.00 a month..
- Buying cost behind $60.00 a month saving: $4.00 a day — at $4.00 a day the figures are Home $20.00 vs buying $80.00 — home saves $60.00 a month.; at the lower neighbor the figures are Home $20.00 vs buying $60.00 — home saves $40.00 a month.; at the upper neighbor the figures are Home $20.00 vs buying $100.00 — home saves $80.00 a month..
What the defaults assume
The defaults are 20 days a month, $1.00 a day at home and $4.00 a day bought, so the headline is one daily cup for one year with modest ingredients and a typical counter price. The model is two multiplications and a subtraction: the home total is days times the home cost, the bought total is days times the buying cost, and the saving is the bought total minus the home total, times 12 for the year. The home reverse is checked at $0.50 either side, because $0.50 over 20 days is $10.00 a month; the buying reverse is checked at $1.00 either side, because $1.00 over 20 days is $20.00 a month. The model does not include the kettle, electricity, or the time spent brewing — price those separately if they matter to the comparison, and read the smoothie comparison for the same method on a blended drink.
Output · formula · meaning
| Output | Formula | What it means |
|---|---|---|
| Home total per month | days × home cost | $20.00 — 20 × $1.00. |
| Buying total per month | days × buying cost | $80.00 — 20 × $4.00. |
| Monthly saving | buying total − home total | $60.00 — $80.00 − $20.00. |
| Yearly saving | (buying total − home total) × 12 | $720.00 — $60.00 × 12. |
| Daily saving | buying cost − home cost | $3.00 — $4.00 − $1.00. |
| Break-even buying cost | home cost | $1.00 — exactly even with home. |
| Home cost behind a target saving | buying cost − target saving ÷ days | $1.00 — $4.00 − $60.00 ÷ 20. |
| Buying cost behind a target saving | home cost + target saving ÷ days | $4.00 — $1.00 + $60.00 ÷ 20. |
| Saving as a share of the bought total | monthly saving ÷ buying total | 75.00% — $60.00 ÷ $80.00, home keeps three quarters of the bought spend. |
| $2.00 home cost, same days and buying cost | same model | Home $40.00 vs buying $80.00 — home saves $40.00 a month. |
| $6.00 buying cost, same days and home cost | same model | Home $20.00 vs buying $120.00 — home saves $100.00 a month. |
| 15 days, same costs | same model | Home $15.00 vs buying $60.00 — home saves $45.00 a month. |
| 25 days, same costs | same model | Home $25.00 vs buying $100.00 — home saves $75.00 a month. |
| Home cost behind $60.00 a month saving | reverse | $1.00 a day: Home $20.00 vs buying $80.00 — home saves $60.00 a month. |
| Buying cost behind $60.00 a month saving | reverse | $4.00 a day: Home $20.00 vs buying $80.00 — home saves $60.00 a month. |
| 0 days | same model | Home $0.00 vs buying $0.00 — exactly even. |
| Negative days | same model | Days per month — 0 or more. |
| Negative home cost | same model | Home cost — $0 or more. |
| Negative buying cost | same model | Buying cost — $0 or more. |
Who uses this
- A commuter weighing a daily tea habit — $1.00 at home against $4.00 bought is $60.00 a month, with the branches showing what dearer ingredients or a pricier counter do to the saving before the habit is set.
- A household budgeting food spending — the reverses recover the home cost or the bought price behind any quoted monthly saving, so a claimed saving can be checked against real receipts.
- A nutrition coach costing a client habit — the 15-day and 25-day branches price a lighter or heavier tea month at once, so a plan can be costed for the weeks it will actually run.
- A kettle owner justifying the purchase — the yearly saving of $720.00 sets the kettle budget: any kettle cheaper than a few months of saving pays for itself inside the year.
Accuracy & limitations
Figures are the model’s own arithmetic on the numbers you type, computed from unrounded values and displayed rounded HALF_UP to 2dp. The main limitation is the inputs, not the arithmetic: whether the home cost covers every ingredient, whether the bought price includes every regular extra, and whether the day count is an honest average are all judgement calls, and this page prices the figures you enter without checking them. This page is a calculation tool, not budgeting or nutrition advice.
Cite this calculator
Home tea at $1.00 a day for 20 days costs $20.00 a month vs buying at $4.00 a day for $80.00: home saves $60.00 a month, $720.00 a year. Source: Bright Side Kit, https://brightoolbox.com/making-tea-at-home-vs-buying-tea/, accessed 29 October 2026.
Frequently asked questions
What counts as the home tea cost?
The ingredients cost per cup: leaves or bags, water, and any milk or honey, priced per cup from the pack price. The kettle, electricity, and your time are not ingredients — if they matter to the comparison, price them as a separate line.
What if I only drink tea on some days?
Enter only the days you actually drink one: 15 days at $1.00 at home is $15.00 a month against $60.00 bought, saving $45.00. Days you skip tea cost $0.00 on both sides and do not belong in the count.
Should I include the kettle in the home cost?
Not in the daily ingredients figure: a kettle is a one-off purchase, and spreading it across days hides the comparison. Compare the $720.00 yearly saving against the kettle price instead — that is the honest payback test.
Why does the yearly saving multiply by 12?
Because the day count is monthly: $60.00 a month times 12 months is $720.00. A weekly tea count would need converting to a monthly count first — roughly 4.33 weeks a month — and mixing weekly and monthly figures in one multiplication is the fastest way to misstate the year.
When does buying beat making at home?
When the bought price falls to the home cost: at a $1.00 bought price the two are exactly even, and below $1.00 buying is cheaper. The break-even buying cost shown by the calculator is always the home cost, whatever the day count.
How is this different from the smoothie comparison?
A tea comparison prices one brewed cup a day, while the smoothie comparison prices one blended drink a day. The method is identical — days times a daily cost on each side — but the daily figures differ, which is why the two pages carry different examples.