How does the Swedish periodiseringsfond (tax reserve) work?

The periodiseringsfond is one of the most practically useful tax planning tools available to Swedish businesses. It provides genuine cash flow benefit and income smoothing with a minimal ongoing cost.

The basic mechanics

Each year, a company can allocate up to 25% of its taxable income (after other deductions but before the periodiseringsfond itself) to one or more periodiseringsfonder (each year creates a separate fund). The allocation directly reduces taxable income and therefore reduces the bolagsskatt due in that year.

The allocated amount must be reversed — added back to taxable income — no later than the sixth income year after the year of allocation. Multiple funds can run simultaneously, with each having its own 6-year clock.

Example: an allocation made for inkomstår 2025 must be reversed by inkomstår 2031 at the latest.

The annual interest charge (schablonintäkt)

The periodiseringsfond is not entirely cost-free. Each year, a schablonintäkt (deemed interest income) is calculated as: Sum of outstanding periodiseringsfond balances at 1 January × 1.5% × the government lending rate (statslåneräntan)

The statslåneräntan fluctuates. In years of low interest rates (2015-2021), the schablonintäkt was minimal (effectively zero in some years when the rate was negative). As interest rates have risen from 2022 onwards, the schablonintäkt has become more meaningful. In 2025, with the statslåneräntan around 2.5-3%, the effective schablonintäkt rate on outstanding balances is approximately 3.75-4.5%.

This is still substantially lower than the benefit from deferring bolagsskatt at 20.6%.

Benefits of the periodiseringsfond

• Immediate cash flow benefit: defer bolagsskatt by up to 6 years. For an allocation of SEK 250,000, the deferred tax is SEK 51,500. Even without a permanent tax saving, having that cash for 6 years is a genuine benefit.

• Income smoothing: if 2025 is an exceptional year and 2027 is expected to be weak, deferring income to 2027 reduces total tax in aggregate (higher marginal rate years → lower marginal rate years).

• Matching against future investments: if you plan significant capital expenditure in 2027, reversing a periodiseringsfond in that year effectively reduces the net tax cost of the investment.

• Loss offset: if a future year produces a loss, reversing the periodiseringsfond adds income to offset the loss — but the loss would have been carried forward anyway, so this mainly helps timing.

AB vs enskild firma differences

For ABs: the periodiseringsfond sits on the company balance sheet. Allocation reduces the AB's taxable income at the 20.6% bolagsskatt rate. Reversal adds back at 20.6%.

For sole traders (enskild firma): the fund is a personal tax reserve. Allocation reduces personal income tax (at up to 52%). Reversal adds income at up to 52%. The benefit is proportionally larger — deferring tax at 50%+ for 6 years is more valuable than deferring at 20.6%.

How to claim

The allocation is reported on Bilaga N8 (for ABs) or Bilaga N3A (for enskild firma owners) attached to the relevant income tax return. No pre-approval is needed. The decision to allocate can be made when the return is filed — up to the July 1 deadline for ABs.

Limits

Maximum allocation per year: 25% of taxable income (after other deductions). Maximum outstanding fund balance: there is no overall cap on accumulated balances across multiple years — if you allocate 25% every year for 6 years, you can have 6 simultaneous funds. But each year's fund must reverse by year 7.