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Accounting · head to head

Fortnox vs Paychex

Fortnox logo

Fortnox

Accounting

Swedish cloud accounting and business platform for bookkeeping, invoicing and payroll

From
Free
Rated
-
Paychex logo

Paychex

Accounting

Outsourced United States payroll, tax filing, benefits and HR services with an assigned service representative

From
$29/month
Rated
-

The short version

  • Only Fortnox has a free tier, so it costs nothing to try first.
  • Each has a real cost: Fortnox corporate packages alone span at least 7 named tiers (Mini through Stor+) priced from 209 kr/man to 919 kr/man, and add-on programs are billed separately per module (SEK); Paychex pricing is quoted rather than published and varies between clients and between renewals, with separate charges for each payroll run, off cycle payments and year end processing, so two similar businesses regularly pay very different amounts for the same service and comparing quotes is difficult by design.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Fortnox and Paychex actually diverge.

Attributes where Fortnox and Paychex differ
AttributeFortnoxPaychex
Starting priceFree$29/month
Free tierYesNo
PlatformsWebWeb, Ios, Android
FoundedUnknown1971

Identical on both: pricing model (subscription), user rating (Not yet rated), category (Accounting).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Fortnox

Nothing recorded that Paychex does not also cover.

Only in Paychex

  • Payroll processing
  • Payroll tax filing
  • Year end forms
  • Multi state payroll
  • Garnishments
  • Time and attendance
  • Benefits administration
  • Retirement plans

What people use each for

The jobs each tool is most often brought in to do.

Fortnox

  • Registering Swedish corporations with guided formation assistancenot Paychex
  • Selling unpaid invoices to improve cash flownot Paychex
  • Managing multiple client businesses from bureau dashboardnot Paychex
  • Integrating payroll with Swedish banking automationnot Paychex

Paychex

  • A United States business with employees in several states that does not want to track differing withholding and unemployment rules internallynot Fortnox
  • A small employer whose accountant recommends outsourcing payroll tax filing so the penalty risk sits with a service providernot Fortnox
  • A growing company that wants payroll, benefits enrolment and a retirement plan administered together rather than through three vendorsnot Fortnox
  • A small employer seeking benefits pricing through a professional employer organisation that it could not negotiate on its own headcountnot Fortnox

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Fortnox

  • Corporate packages alone span at least 7 named tiers (Mini through Stor+) priced from 209 kr/man to 919 kr/man, and add-on programs are billed separately per module (SEK)
  • The Fortnox Access verification tier is priced by transaction volume, rising from 9 kr/man at zero verifications to 199 kr/man at 1000+ verifications (SEK), so cost is not fixed and scales with usage

Paychex

  • Pricing is quoted rather than published and varies between clients and between renewals, with separate charges for each payroll run, off cycle payments and year end processing, so two similar businesses regularly pay very different amounts for the same service and comparing quotes is difficult by design.
  • Charging per payroll run rather than per month penalises employers who pay weekly or who run frequent off cycles, so a business with hourly staff on a weekly cycle pays several times what a monthly salaried business of the same size pays.
  • Migrating mid year requires transferring year to date wage and tax figures for every employee in every jurisdiction, so in practice companies switch only at a calendar year end, which leaves you locked to the incumbent for the rest of the year whatever the service is like.
  • The service model depends on an assigned representative, and reported experience varies sharply with who that person is and how often the assignment changes, which means the quality of what you bought is not a property of the product you evaluated.
  • It is a United States service, so a company with employees abroad still needs a separate payroll provider in each country, and the group has no single view of employment cost without building one outside the system.

Pricing, plan by plan

Fortnox

Free
  • New Company TrialFree
    • 6-month free trial for newly started businesses

Paychex

$29/month
  • Flex Essentials$39/month
    • Payroll
    • Tax administration
    • Direct deposit
  • Flex Select$59/month
    • HR administration
    • State unemployment insurance
    • New hire reporting

Which should you pick?

Choose Fortnox if

  • You want to start without paying.

Choose Paychex if

  • You need payroll processing.
  • You work on Web, Ios, Android.
  • You also want payroll tax filing.

Questions people ask

Is Fortnox or Paychex better?
Neither clearly leads. Fortnox starts at Free and Paychex at $29/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Fortnox or Paychex?
Fortnox has a free tier; the other does not. Paid plans start at Free for Fortnox and $29/month for Paychex.
Does Fortnox or Paychex run on more platforms?
Fortnox runs on Web. Paychex runs on Web, Ios, Android.
Can I use Fortnox for free?
Yes. Fortnox has a free tier, so you can try it without paying. Paychex starts at $29/month.
What is Fortnox best used for?
Fortnox is most often used for registering swedish corporations with guided formation assistance, selling unpaid invoices to improve cash flow, managing multiple client businesses from bureau dashboard, integrating payroll with swedish banking automation. Of those, registering swedish corporations with guided formation assistance and selling unpaid invoices to improve cash flow are not what Paychex is typically brought in for.
What can Fortnox do that Paychex cannot?
Paychex covers Payroll processing, Payroll tax filing, Year end forms, Multi state payroll.

Answered from the vendors’ own pages

Fortnox: Does Fortnox offer a free trial?

Yes, newly started businesses receive their first six months in Fortnox at no cost, followed by subscription-based pricing.

Source
Paychex: How much does it cost?

Paychex quotes per client rather than publishing rates, and the structure typically includes a base fee plus a per employee per payroll charge with extras for year end and off cycle runs. Get the full fee schedule in writing, including what a mid year change of plan costs.

Fortnox: What pricing tiers does Fortnox offer?

Fortnox offers tiered subscription packages that vary by module (accounting, invoicing, payroll) but specific pricing details are not listed on the main website.

Source
Paychex: Who is liable if payroll taxes are filed late or wrongly?

Contractually the provider generally accepts responsibility for errors it makes, but the employer remains the party the tax authorities pursue. Read the specific indemnity language rather than relying on the sales description.

Fortnox: How can I find Fortnox pricing information?

Detailed pricing is available on the packages page (/paket), through a purchasing guide tool at buy-guide.fortnox.se, or by contacting sales representatives directly.

Source
Paychex: Can I switch providers mid year?

Technically yes, but you must carry year to date figures across for every employee and jurisdiction, and errors there surface at year end on employee tax forms. Most businesses switch effective 1 January for that reason.

Paychex: What is the difference between the standard service and the professional employer organisation option?

Under the professional employer organisation arrangement Paychex becomes a co-employer for tax and benefits purposes, which changes your benefits access and some of your employment administration. It costs more and it is harder to unwind, so treat it as a different decision from buying payroll.

Paychex: Does it work with my accounting software?

It exports a general ledger file and connects to the mainstream accounting products. Confirm the mapping to your chart of accounts during onboarding, because a generic export means your bookkeeper recodes every run.

Paychex: Is it suitable if we only have a few employees?

It will serve you, but very small employers often find the per run charges and the service tiering expensive relative to self service payroll products. The case improves once multi state complexity or benefits administration enters the picture.

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