Unattended shop monthly profit calculator

Work out what an unattended shop leaves you in a month, with none of the outgoings left off the form.

Rent and power, card fees, spoilage, theft and repairs all have their own boxes. If an item is zero, type zero. While any box is still blank the result stays closed. No account, and the numbers you type never leave this page.

What kind of shop

An outline fills in no amounts. It only marks the boxes worth checking for that trade, and whichever outline you pick every box stays on the form.

Money coming in

What comes in on a day you are open, and how many days a month you open.

Average daily takings (KRW)What comes in on a day you are open, card and cash together. If you have not opened yet this is a guess, and since the answer moves a great deal with it, try a low figure as well.Days open per monthAn unattended shop that stays open around the clock is 30 or 31. Subtract any days you close.

Money going out every month

These go out even when sales are zero. If an item does not apply, type zero rather than leaving it blank.

Rent (KRW)What you pay for the space. If you only rent a spot, as with a vending machine, the fee for that spot goes here. Type zero if you own the premises.Building service charge (KRW)What the building collects on top of rent. Type zero if you were told it is included in the rent.Electricity (KRW)Freezers, washers, heating and cooling and the lit sign run all day whether or not anyone is there. In an unattended shop power is usually larger than expected.Water and gas (KRW)Type zero for a shop that uses no water.Internet and cameras (KRW)The line for the payment terminal and any remote monitoring service go here too.Equipment payments (KRW)Lease or instalment payments made every month. If you bought outright and owe nothing monthly, type zero and put the purchase price under money spent up front.Insurance (KRW)Fire or liability cover on the shop. Type zero if you have none.Cleaning and upkeep paid out (KRW)Unattended still means somebody turns up. Put what you pay them here, or type zero if you do it yourself and record those hours further down.Theft and breakage (KRW)What goes missing or gets broken in a month. Type zero if it has not happened to you.Repairs (KRW)For one large repair a year, divide by twelve. Sales lost while a machine stood idle belong in the daily takings box, not here.Anything else monthly (KRW)Bags, detergent, consumables, bookkeeping fees and whatever else is not listed above. Type zero if there is nothing.

Money that rides on sales

These grow with sales, so they go in as percentages.

Cost of goods (%)What you paid for the stock, as a share of what you sold it for. Buy at 1,000 and sell at 1,500 and this is about 67. A shop that sells no goods types zero.Share paid by card (%)How much of your takings arrives by card. If you take no cash it is 100. The fee below applies only to this share.Card fee rate (%)What the card company takes. It differs from merchant to merchant, so use the rate printed on your card statement or shown in your merchant portal.Written off (%)The share that passes its date or spoils and cannot be sold. Type zero if there is nothing to throw away.

Why no card fee rate is filled in

Article 18-3(3) of the Specialized Credit Finance Business Act (여신전문금융업법) requires card companies to apply a preferential rate, set by the Financial Services Commission, to small merchants. Article 6-13(2) of its Enforcement Decree sets four annual turnover bands: up to 300 million won, 300 to 500 million, 500 million to 1 billion, and 1 to 3 billion. The rates themselves appear in neither article. The Commission sets them and they are revised on a cycle, so nothing is hard coded here. Use the rate on your own card statement or merchant portal.

Sources: Korean law portal, Specialized Credit Finance Business Act art. 18-3, Korean law portal, Enforcement Decree of the same Act art. 6-13 (checked 2026-09-08)

Money spent up front, and your own hours

The monthly result works without these. Fill them in and you also get the months to earn the outlay back and what an hour of your own time comes to.

Rental deposit (KRW)The sum you get back when you close. It stays out of the payback months and only appears as a note that the money is tied up meanwhile.Money spent up front (KRW)Key money, fit out and equipment purchases, the sums you do not get back. The rental deposit goes in the box above instead.Your own hours per monthRestocking trips, tidying, calling someone out when a machine fails, and going through the books. Very few unattended shops are truly zero.

Some boxes are still blank

17 boxes are empty. If an item is zero, type zero. Counting a blank box as zero makes that cost look like money that never goes out, and that is the very thing this calculator is for.

Average daily takings (KRW)
Days open per month
Rent (KRW)
Building service charge (KRW)
Electricity (KRW)
Water and gas (KRW)
Internet and cameras (KRW)
Equipment payments (KRW)
Insurance (KRW)
Cleaning and upkeep paid out (KRW)
Theft and breakage (KRW)
Repairs (KRW)
Anything else monthly (KRW)
Cost of goods (%)
Share paid by card (%)
Card fee rate (%)
Written off (%)

Sources: Korean law portal, Specialized Credit Finance Business Act art. 18-3, Korean law portal, Enforcement Decree of the same Act art. 6-13, Korean law portal, Fair Transactions in Franchise Business Act art. 2, Korean law portal, Fair Transactions in Franchise Business Act art. 9, Korean law portal, Enforcement Decree of the Food Sanitation Act art. 21, Korea Fair Trade Commission franchise disclosure registry

What this calculator does not do

It does not urge you to open a shop, or to avoid one. There is no operator directory here, no franchise enquiry form, and no paid referral link. There never will be.

It does not tell you what you can earn. Sales are something you type in, not something this page knows. Daily takings are usually the number you know least, and if that one is wrong the rest being right will not save the answer.

It carries no industry average amounts. We could not find published measured figures for what these shops actually spend, and an invented number would look like the most trustworthy thing on the screen.

It does not work out tax or loan interest. Value added tax, income tax and interest are a separate sum.

Read what goes in and what comes out

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