Sole Proprietor Monthly Overhead Calculator
Add up the monthly fixed expenses of a sole proprietorship (Bağ-Kur, accounting, stamp/ledger, rent, other) and see the annual and daily fixed burden.
Things to keep in mind:
- Bağ-Kur premiums, accounting and stamp costs vary by person, city and period; enter your current amounts.
- Income tax, VAT and variable costs are not included.
- VAT and withholding effects of rent are not modelled.
Calculator
Result
Enter the values and press Calculate to see the result here.
About this tool
A sole proprietor must cover Bağ-Kur premiums, accounting fees, rent and similar fixed costs every month, even without income. This tool adds them up and shows the annual and daily fixed cost, so you can see how much revenue the business needs each month just to stay afloat.
Formulas
- Monthly total = Bağ-Kur + Accounting + Stamp/ledger + Rent + Other
- Annual total = Monthly total × 12
- Daily fixed cost = Annual total / 365
Amounts are rounded to 2 decimals, half up (HALF_UP). Add annual payments divided by 12 to the monthly items. All amounts are values you enter; the Bağ-Kur premium depends on the income bracket you choose, so the tool suggests no default.
Example 1: Bağ-Kur TRY 9,000, accounting 2,500, stamp/ledger 500, rent 5,000 and other 1,000 give TRY 18,000.00 a month, TRY 216,000.00 a year and about TRY 591.78 a day.
Example 2 (amounts with decimals): Bağ-Kur 1.25, accounting 2.50, stamp/ledger 3.75, rent 4.00 and other 5.50 give a monthly total of 17.00, an annual total of 204.00 and a daily cost of 0.56.
How to read the result: The monthly total is the fixed burden you must cover even if you make no sales. The annual total is for budgeting, and the daily fixed cost shows the level of cost to be covered every day. Use the result as fixed cost in break-even calculations or carry it to the fixed/variable split tool. Income tax, VAT and variable costs are not included, so your real fixed burden may be higher than this result.
How to use
- Enter the monthly amount for each item; leave missing items at 0.
- Add annual payments divided by 12.
- Use the same VAT basis for all amounts.
- Press Calculate.
Notes
Amounts are rounded HALF_UP to two decimals. The annual total uses 12 months and the daily cost 365 days. All inputs are yours.
Sources
Frequently asked questions
Costs paid regardless of sales: Bağ-Kur premium, accounting fee, rent, insurance, internet and similar.
Check the current amount in your SGK notification or e-Devlet service statement. This tool does not suggest a premium.
Yes; enter the same items in the limited company monthly fixed cost tool and compare the totals. Tax differences must be assessed separately.
It helps you set the minimum daily contribution you need and can feed a break-even analysis.
Next step
Related tools to continue your calculation.
- Calculate
Limited Company Monthly Overhead Calculator
Add up the monthly fixed expenses of a limited company (accounting, address, stamp/ledger, bank/software, other) and see the annual and daily fixed cost.
- Calculate
Fixed and Variable Expense Split
Total your costs as fixed and variable and see the fixed cost share. Enter revenue to also get the contribution margin ratio and break-even sales.
- Calculate
Break-Even Point Calculator
Calculate the break-even point in units and revenue, the contribution margin and the sales needed for a target profit from fixed costs, price and variable cost.
- Calculate
Annual Books and Stationery Cost Allocation
Spread annual ledger certification and stationery costs over the months to see the monthly fixed burden and the ledger certification share.
- Calculate
Rent and Overhead Allocation per Item
Spread rent and overheads over the number of units to see the fixed-cost share per unit and the full unit cost.
- Calculate
Gross to Net Salary Calculator
Turn a Turkish gross monthly salary into net pay for 2026: social security, unemployment insurance, cumulative income tax, stamp duty, minimum wage exemptions and employer cost.