A Model Example: 35,000 CZK Net Income in Czechia. What Is Actually Left?

The model setup

Petr is a fictional 32-year-old living alone in a rented one-bedroom flat in a regional city such as Olomouc or Plzeň. All amounts are model assumptions, deliberately kept realistic. The rent figure is anchored to rental-market data for Q2 2026, which put the average rent for a 2+kk flat in Plzeň or Olomouc at around 15,500 CZK (as summarised by Kurzy.cz); a smaller flat rents somewhat lower.

Fixed costs: the part that leaves first

• Rent including building charges: 14,500 CZK
• Energy (electricity, heating): 2,800 CZK
• Internet and mobile: 900 CZK
• Insurance (household, liability): 400 CZK
• Subscriptions (streaming, music, cloud, gym): 1,100 CZK
• Phone instalment: 1,500 CZK

Fixed costs total 21,200 CZK, which is about 61 percent of net income. That sits inside the 50 to 65 percent range we describe in the data piece on how much of income fixed costs take. The money is committed before the month even begins.

Variable spending: the part you can steer

• Groceries: 6,000 CZK
• Public transport: 800 CZK
• Eating out, lunches, coffee: 2,500 CZK
• Toiletries, clothes, everything else: 2,000 CZK

Variable spending totals 11,300 CZK. Together with fixed costs that is 32,500 CZK.

What actually remains

On paper 2,500 CZK remains, about 7 percent of income. In practice this residual usually evaporates: an annual payment lands, shoes wear out, a birthday comes up. A leftover at the end of the month is the weakest form of saving, because it is what every surprise feeds on first. That is why the model flips the order.

How to set aside the first 1,000 CZK

The model rule: on payday, before anything else, 1,000 CZK moves to a separate account. Not what is left at the end, but the first payment of the month. And so that it does not hurt, the thousand is not taken from food or living standard but found inside the fixed block:

• 400 CZK: cancelling one to two unused subscriptions (1,100 falls to 700),
• 300 CZK: switching an old mobile tariff (900 falls to 600),
• 300 CZK: changing energy supplier or tariff (2,800 falls to 2,500).

Finding these leaks by hand means combing through statements for hours. A faster route: upload one bank statement at app.vestelonflow.com, the VESTELON FLOW analysis runs directly in your browser and you see your recurring payments sorted in about a minute. No account and no bank login needed, and nothing leaves your device without your consent.

What 1,000 CZK a month can grow into

Regularly invested, for example into a broad index fund, 1,000 CZK a month adds up. (A return of around 7 percent a year is only illustrative, roughly the long-term average of stock markets. Past performance does not guarantee future results, the value of an investment can also fall, and this text is not financial advice.) With monthly compounding:

• after 5 years: 71,590 CZK (deposits 60,000 CZK),
• after 10 years: 173,080 CZK (deposits 120,000 CZK),
• after 20 years: 520,930 CZK (deposits 240,000 CZK, roughly 20,800 EUR).

How to recheck the maths

The standard future-value formula for an end-of-month deposit: FV = deposit × ((1 + r)^n − 1) / r, where r is the annual return divided by 12 (for 7 percent: 0.07 / 12 = 0.0058333) and n is the number of months. Check for 10 years: (1.0058333)^120 = 2.0097, then (2.0097 − 1) / 0.0058333 = 173.1, times 1,000 CZK gives about 173,080 CZK. Rounding may shift the result by a few crowns.

What if your numbers are different

They almost certainly are. In Prague, the same Q2 2026 market data show rent swallowing roughly 9,000 CZK more, and the leftover can shrink to zero. As a couple, rent and energy are shared and the buffer grows. So do not copy the model, substitute into it: take your net income, add up your own fixed payments, subtract variable life and see what comes out. Three numbers are enough. If the result is negative, a stricter weekend almost never fixes it, one large fixed item does. If it is positive, send the first thousand away on payday, before the month dissolves it.

The point of the model

An ordinary Czech payslip of 35,000 CZK net leaves about 2,500 CZK on paper and often nothing in reality. The first 1,000 CZK of saving does not come from discipline at the shop counter, it comes from three boring phone calls and cancellations inside the fixed block. If you want to see where your own thousand is hiding, one uploaded statement at app.vestelonflow.com shows your number in about a minute. The model is fictional. Your leaks are not.