Personal finance

9 min read

Where to start controlling personal finances before investing. How to track expenses?

Learn how to run a personal budget, close financial gaps, build an emergency fund, calculate your net worth and decide how much you can invest every month.

Oleksandr Yutysh

Author

· Co-founder of Strum

Before choosing investment instruments, answer one question: do you understand where your money goes? Control over personal finances is the foundation. Without it, any investment strategy risks staying on paper.

Start controlling your finances before investing in this order: income and expenses → debts → reserve → net worth → goals → the amount available for investing.

Let's go through each step in detail.

What personal finance control means

A personal budget is a system for planning and controlling income, expenses, savings and future financial obligations. It is the tool that shows the full picture of your finances.

It is important to distinguish three levels of working with money:

LevelWhat it means
Expense trackingrecording purchases after the fact
Budget planningallocating income across categories in advance
Personal finance managementcombining the budget, reserve, debts and goals into one system

Why expense tracking alone is not enough for budgeting

Many people diligently log every purchase in an app or a notebook, but that does not guarantee financial control. Tracking ≠ a financial plan:

  • you can keep a detailed record of income and expenses and still not know your net worth;
  • log every dollar and still have no reserve;
  • control small purchases while ignoring expensive loans;
  • have no idea how much you can realistically invest each month.

The goal of this article is to help you move from simple expense tracking to full personal finance management.

Where to start with a personal budget: the financial audit

A first financial audit takes one evening. Here is the step-by-step routine.

Step 1. Count and write down all income

Include every source: salary, irregular income, freelance work, rent and other regular inflows. If your income is unstable, use the average or a conservative baseline over the last 3–6 months rather than your best month.

Step 2. Analyse mandatory and optional expenses

Split all expenses into at least four categories:

CategoryExamples
Mandatoryhousing, groceries, transport, healthcare
Financial obligationsloans, instalments
Periodicinsurance, repairs, taxes, large purchases
Optionalrestaurants, entertainment, subscriptions

Analyse several previous months rather than one random one, so you see the real picture instead of a distorted one. To avoid collecting transactions by hand, try our budget and expense tracking: Strum imports bank statements and sorts expenses into categories automatically.

Step 3. Calculate your net worth

The formula is simple:

Net worth = all assets − all financial obligations

Assets include:

  • savings,
  • investments,
  • real estate;

obligations are loans and other debts.

Example: assets of 420,000 UAH and debts of 120,000 UAH give a net worth of 300,000 UAH.

The month-to-month trend of this number is often more informative than the absolute figure. Our investment tracker calculates it automatically: it brings portfolios, accounts, cash and debts into one picture of your capital and shows how it changes over time.

Managing personal finances: from theory to practice

How to start budgeting

A simple cycle you can repeat every month:

  1. Collect all transactions.
  2. Sort them into categories.
  3. Compare income and expenses.
  4. Set limits.
  5. Plan your savings.
  6. At the end of the month, review the result and adjust the plan.

How to use the 50/30/20 rule

One of the most popular income allocation models:

  • 50% for needs;
  • 30% for wants;
  • 20% for savings and financial goals.

It is a guideline, not a universal rule. The proportions can differ a lot if you pay high rent, have unstable income, active loans or an ambitious savings goal. Use the rule as a starting point, not a rigid standard.

Which financial gaps to close before investing

GapHow to spot itWhat to do
Expenses exceed incomenegative cash flowbalance the budget
No reservean unexpected expense requires a loanbuild a reserve
Expensive debtlarge interest paymentsprioritise repayment
No expense controlunclear where the money goesset up tracking
No financial goalsinvesting "just for profit"define goals and a horizon
No free cash flowirregular investingfind your real investing capacity

How much money to keep in reserve

What is an emergency fund?

An emergency fund is a reserve for unexpected situations: loss of income, urgent medical treatment, repairs. Do not confuse three different things: the emergency fund, money for a planned large purchase and investment capital. These are separate "pockets" and should not be mixed.

How to calculate the size of your reserve

There is no universal number. The size of the reserve depends on several factors: income stability, the number of income sources, the number of dependants, how regular large expenses are, whether you have insurance and how secure your job is.

A simple formula:

Reserve = average essential monthly expenses × number of months of reserve

For example, if essential monthly expenses are 25,000 UAH and you aim for a 6-month reserve, you need 150,000 UAH.

Should you pay off a loan before investing

Before deciding, assess the interest rate on the debt, the type of loan, the size of the minimum payments, any early repayment penalties, the impact of the payments on your monthly cash flow and whether you have a reserve.

Which debts need the most attention

Expensive consumer debt (for example, a high-rate credit card) is usually worth repaying first: its cost often exceeds the potential return on investments. Long-term obligations with a low rate, such as a mortgage, can be serviced in parallel with investing.

Start by defining financial goals

Short-term and long-term financial goals

Goal typeExamples
Short-termemergency fund, holiday, education, gadgets
Medium-terma car, a down payment on a home
Long-termretirement capital, children's education, financial independence, passive income

For each goal, define the amount, the deadline, the capital already saved and the size of the regular contribution. You can record your goals and calculate the required monthly contributions in our financial goals and planning section, and if passive income is one of them, track it with the dividend tracker.

What a personal financial plan looks like

Current state – the actual picture of your finances today: income, expenses, debts, existing savings and net worth.

Goals – what you want to achieve: an emergency fund, a car, a home, retirement capital.

Deadlines – when exactly each amount will be needed: in six months, in 3 years or in 20 years. The deadline determines which instruments are suitable.

Required amounts – how much money each goal really needs, taking inflation and your own expectations into account.

Monthly cash flow – what is left after mandatory expenses and debt payments, that is, how much you can regularly direct towards your goals.

Saving and investing strategy – a concrete plan: where, how much and how often to invest in order to reach the goals on time.

How to determine how much you can invest each month

The advice "invest 10–20% of your income" sounds convenient, but it does not always reflect reality. A more precise calculation:

Amount to invest = net income − essential expenses − debt payments − reserve contributions − short-term goal contributions

Once the reserve is built, the cash flow structure usually changes and the amount available for investing grows. This figure is called your investing capacity.

Are you ready to invest? Checklist

Go through the points below and tick the ones that apply to you. The more ticks, the more confidently you can move on to investing. If fewer than half apply, go back to the previous steps.

  • I know my average monthly income.
  • I know my average mandatory expenses.
  • I keep a budget regularly.
  • I know the total of my assets and debts.
  • I have calculated my net worth.
  • I have a reserve for unexpected situations.
  • Loan payments do not put critical pressure on my budget.
  • I have defined short- and long-term financial goals.
  • I know the amount I can regularly direct to investments.
  • I will not need this money for everyday expenses in the near future.

You do not have to wait for the "perfect" financial state. But investing must not create a budget deficit or force you to use the reserve for ordinary expenses.

What to know before your first investment

You need a clear understanding of the basic concepts: investment horizon, risk level, diversification, liquidity, fees, taxation and the difference between saving and investing.

If you can explain each of these concepts to a five-year-old, you are ready for the next step.

FAQ

Frequently asked questions

Keep an eye on the budget throughout the month and review the results at the end of each month. The financial plan can be reviewed less often: quarterly, or after significant changes in income, expenses, debts or life goals.

Excel can only be managed manually, while an app automates the process, offers analytics and combines data from several accounts in one place.

A budget is a short-term tool for managing income and expenses within a month. A financial plan is a broader strategy that covers goals, deadlines, reserves and investments for years ahead.

Build the budget from a conservative baseline income, the average of several previous months, rather than from your best month. This gives a more realistic picture and protects you from unnecessary stress in a weaker month.

About the author

Oleksandr Yutysh — co-founder of Strum and founder of YU.invest

Co-founder of Strum

Co-founder of Strum, founder of YU.invest, and author of Strum feature and financial-methodology content.

Author profile

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