2.5From accounting profit to taxable profit
The essentials in 30 seconds
- Accounting ≠ tax: accounting profit (income − expenses) is not the tax base — the tax office has its own rules.
- Two adjustments: add-backs add non-deductible expenses (base rises), deductions remove non-taxable items (base falls).
- The formula: taxable profit = accounting + add-backs − deductions — country-by-country technique, delegated to your accountant.
Running case — Rachid and his surprise tax bill
Rachid planned his tax on his €50,000 profit… but the bill is heavier: a €5,000 fine, properly expensed in the books, is not deductible — the tax office adds it back. Final episode: Rachid understands why tax is never computed on the stated profit.
Final episode of cases 2.1–2.4 — Rachid links his profit to his tax.
1. Accounting ≠ tax
Crucial distinction: the accounting profit (revenue − expenses of the income statement) is not always equal to the taxable profit (the one on which tax is calculated).
The tax authority has its own rules: some recorded expenses are not tax deductible.
2. Add-backs & deductions
Two adjustments. Add-backs: you add back recorded expenses that the tax authority does not accept (fines, lavish expenses…) → the base increases.
Deductions: you remove items that are non-taxable or already taxed → the base decreases.
3. The taxable base
Taxable profit = accounting profit + add-backs − deductions. It is on this taxable profit that the tax is applied (corporate tax — 5.1).
These rules are technical and specific to each country (handled by the chartered accountant). The principle avoids a major confusion about how tax is calculated.
🔎 Concrete example — 🔎 Concrete example — Why tax ≠ accounting profit
The adjustments.
Accounting profit: €50,000.
+ Non-deductible fine added back: + €5,000.
− Non-taxable item: − €2,000 → taxable profit = €53,000 (tax base).Result: tax is not calculated on the displayed profit.
Reflex: understand the principle, delegate the technicalities to the chartered accountant.
Section vocabulary
- Accounting profit
- Profit from the income statement (income − expenses) under accounting rules.
Simple example: Rachid's stated €50,000 profit: his accounting profit.
What it is not: the tax base — it still needs restating.
Reflex: the calculation's starting point, never its end.
- Taxable profit
- Tax computation base, obtained by restating accounting profit under tax rules.
Simple example: Rachid's €53,000 after restatements: his taxable profit.
What it is not: the stated profit — it ignores the tax office's rules.
Reflex: tax applies to it, and it alone.
- Add-back
- Addition to profit of an expensed but non-deductible charge (raises the taxable base).
Simple example: Rachid's €5,000 fine, added back: his base rises.
What it is not: a cut lowering the base — that is a deduction.
Reflex: non-deductible = add back.
- Tax deduction
- Removal of a non-taxable or already-taxed item (lowers the taxable base).
Simple example: Rachid's €2,000 non-taxable item, deducted: his base falls.
What it is not: an addition raising the base — that is an add-back.
Reflex: non-taxable = remove.
- Tax base
- Amount (taxable profit) to which the tax rate applies.
Simple example: €53,000: Rachid's tax base for this year.
What it is not: turnover or cash — those are not profits.
Reflex: tax = restated base × country rules, never gross profit.
In practice — In practice — Going from accounting profit to taxable profit
- Start from the accounting profit (revenue − expenses of the income statement).
- Add the add-backs: recorded expenses that are not tax deductible (they increase the base).
- Remove the deductions: non-taxable items or already taxed ones (they decrease the base).
- Obtain the taxable profit (= accounting + add-backs − deductions), the base for calculating tax (rules by country).
Ready-to-say script — framing with your accountant (30 s)
“I won't redo the tax return myself, but I want to understand: what is my accounting profit, which add-backs raise it, which deductions lower it — and on what final base am I taxed?”
Say it to your accountant at each closing: accounting, plus, minus, base — the four numbers to know.
Copy-paste template — accounting → taxable bridge
ACCOUNTING PROFIT (income − expenses): _______________
+ ADD-BACKS (non-deductible expenses): _______________
− DEDUCTIONS (non-taxable, already taxed): _______________
= TAXABLE PROFIT (tax base): _______________Small business / tight budget
Remember the formula and flag any fine or unusual spending to your accountant: they decide deductibility.
Algerian SME
Rachid sorts his “sensitive” expenses (fines, penalties, off-norm costs) during the year: closing and IBS are simpler for it.
Planned investment
Before buying, ask your accountant the tax effect (deductible? spread?): the real cost depends on the answer.
Inspection / bank dialogue
Explain the gap between stated profit and tax paid in three lines (add-backs, deductions): a manager who knows this inspires trust.
✓ Best practices
- Remember: tax is calculated on the taxable profit, not the accounting profit.
- Understand the principle of add-backs/deductions; delegate the technicalities.
- Check that the rules applied are those of your country.
✗ Common pitfalls
- Believing that tax = a percentage of the displayed accounting profit.
- Confusing add-back (increases the base) and deduction (decreases it).
- Applying rules from another country (they are specific to each country).
Key takeaways
- The accounting profit (income statement) often differs from the taxable profit (tax base).
- Add-backs: add the expenses that are not tax deductible (they increase the base).
- Deductions: remove the non-taxable or already taxed items (they decrease the base).
- Taxable profit = accounting + add-backs − deductions; rules that are technical and specific to each country.
48h Challenge — apply tomorrow
With your accountant (or your latest closing), fill in the accounting → taxable template above: 1 add-back and 1 deduction identified and explained in one sentence each.
- I can explain add-back and deduction in one sentence each.
- I can recite the taxable-profit formula.
- I have filled the template with 1 real add-back and 1 real deduction.
Frequently asked questions
Why does the tax authority not accept all the accounting expenses?
Because the objectives of accounting and taxation differ. Accounting aims at the true and fair view: it records all the expenses actually incurred. Taxation aims at a fair taxable base and anti-abuse: the State decides that certain expenses, although real, must not reduce the tax. Examples of non-deductible expenses: fines and penalties (it would be shocking for the State to "subsidise" an offence), certain lavish expenses, part of some costs (vehicles above a ceiling, excessive gifts). These expenses remain recorded, but they are added back for the tax calculation — hence a taxable profit sometimes higher than the accounting one. These rules are specific to each country and complex, hence the role of the chartered accountant.
Do I need to master these tax adjustments myself?
Understanding the principle, yes; mastering all the technical details, no, for a non-specialist. The principle to remember: accounting profit ≠ taxable profit, and tax is calculated on the latter (after add-backs and deductions), not on the displayed accounting profit — which avoids the confusion "I made €50,000 of profit, so I will be taxed on €50,000" (not necessarily). The precise mechanics (which expenses to add back, which deduction schemes, at what rates) are technical, evolving and specific to each country: that is the domain of the chartered accountant and the tax specialist. A manager gains from understanding the logic to converse and decide, without doing the tax return package himself.
Rachid paid a €5,000 fine, recorded as an expense. Effect on his tax?