Side Income
The freelance rate that actually replaces a salary
A day rate has to cover holiday, sickness, pension, admin and the weeks with no work.

What follows is an argument about freelance rates, and about where the received version of it stops being true.
The argument in brief
- Billable days are far fewer than working days.
- Pension, leave and sick pay must be self-funded.
- Late payment is a cashflow risk that needs its own buffer.
Count the billable days honestly
A year contains far fewer billable days than calendar days once holiday, illness, admin, marketing and gaps between contracts are removed. Many freelancers find their actual billable figure is well below what they assumed when setting rates.
Dividing target annual income by that realistic figure gives the rate the work actually needs to command. The figure is not stable either, because a year built on one long engagement has a very different billable count from a year of short projects with a gap after each.
Self-funded benefits are real costs
Pension contributions, income protection, holiday and sick leave all come out of the rate rather than sitting alongside it. An employed person receives these in addition to salary, which is why comparing rate to salary directly is misleading. Adding them explicitly to the calculation is what makes a rate sustainable rather than merely attractive.
Insurance belongs on that list in most fields, since professional indemnity or public liability cover is frequently a condition of the contract, and income protection bought individually costs more than an employer scheme covering a whole group.
Tax needs setting aside from day one
Income arrives gross, and the liability arrives later, often with payments on account that catch people out in year two. Moving a fixed percentage of every payment into a separate account at the moment of receipt is the practice that prevents this. The right percentage depends on jurisdiction and income level and is worth confirming with an accountant once.
For most people, registration deadlines, sales tax thresholds and compulsory social contributions all carry dates, and penalties in most systems attach to lateness rather than to the amount, so the calendar matters as much as the arithmetic.
Late payment is the recurring problem
Payment terms are frequently long and frequently ignored by clients. A buffer of several months of costs is not optional; it is what allows you to keep working while chasing. Clear terms, prompt invoicing and early polite chasing shorten the cycle more than anything else.
Many jurisdictions give a statutory right to interest and recovery costs on late commercial payment, and citing it in a reminder moves invoices that a polite request did not.
Raising rates is easier with new clients
Existing clients anchor to the rate they have paid, and increases meet resistance. Setting the rate correctly at the start of each relationship is far easier than correcting it later. Periodically replacing the lowest-paying client is how most freelancers actually raise their average rate.
Where a single client provides most of the income, the position is closer to employment without the protections, and in several countries a tax authority takes the same view of the arrangement.
The contract terms that cost money later
Payment terms, what counts as an acceptable deliverable and who owns the finished work are the three clauses that decide whether a disagreement is short or long. Unlimited revisions, an undefined scope, or approval resting on satisfaction rather than on stated criteria are each a way for a fixed price to become an open-ended commitment. A deposit or staged payments move the cash flow risk and are ordinary in most fields, and a client who refuses every version of them has told you something before the work starts.
The useful part is this: where a contract is long, unusual or with a client in another country, an hour of legal advice costs less than one unpaid invoice and is a deductible business expense in most systems.
The takeaway
Divide your income target by realistic billable days, then add the benefits you now fund yourself.
Small and repeatable beats ambitious and abandoned, almost every time.
Questions readers ask
How many billable days should I assume?
Considerably fewer than working days once leave, illness, admin and gaps are removed. Track your own figure for a year and use that rather than an assumption.
Should I charge by day or by project?
Project pricing rewards efficiency and requires accurate scoping; day rates are safer when scope is uncertain. Many freelancers use both depending on the client.
Also by Sorcha Byrne
- Overtime, unsocial hours and the pay that is not really extraHours & Conditions
- The cost base nobody counts in a side incomeSide Income
- When a side income is ready to replace the salarySide Income
- How holiday pay is calculated when your hours varyHours & Conditions





