Guide

Make a written agreement for every assignment, even a small gig for a client you know well. The agreement doesn't need to be a lengthy document drafted by a lawyer: an email exchange or a written and accepted quote that spells out the scope, price and timeline is enough for most situations. What matters most is that everything agreed is in writing before work begins.

#Why a written agreement pays off

Most client disputes aren't caused by ill intent but by the two parties remembering the agreement differently. The client thought the price included changes, you thought those counted as extra work. The client assumed the job would be finished by the end of the month, you assumed sometime the following month. A written agreement removes this problem: once things are documented, both sides can check what was agreed instead of arguing over memories.

An agreement also matters for getting paid. If a client leaves an invoice unpaid and disputes what was agreed, a written agreement makes your claim undisputed and collection possible. Without documentation, it's just one person's word against the other's. A written agreement also signals professionalism: clients take you more seriously when you work in a structured way.

#What the agreement should include

Scope of work is the most important part of the agreement. Describe concretely what you'll do, what the end result includes and what it doesn't. The more precise the description, the less room for interpretation. Also note what the client needs to deliver or do for the work to proceed: for example, materials, credentials or feedback by a certain date. Many schedule delays are caused by the client's own delays, and this clause protects you from them.

Price and payment terms should be stated unambiguously: fixed price or hourly rate, whether the price includes VAT, and what payment terms apply, for example net 14 days. For larger jobs, agree on payment installments: part upfront, part at milestones and the remainder after the approved end result. For the schedule, record the start date, any milestones, the completion date, and how delays will be communicated.

It's worth agreeing on changes and extra work in advance: how to handle it when the client wants to change or expand the scope midway through. A workable approach is to state that any work beyond the agreed scope is billed separately and agreed in writing before it's carried out. Record who is responsible for what: what happens if the work is delayed, how errors are fixed, and how the agreement can be terminated if needed. Fair, clear liability terms protect both parties.

#Verbal vs. written agreement

In Finland, a verbal agreement is in principle just as valid as a written one. The issue isn't validity but proof: if a disagreement arises, it's nearly impossible to prove the content of a verbal agreement. So the rule of thumb is simple: you can agree verbally, but always confirm what was agreed in writing.

In practice this is easy. After agreeing something with a client by phone or in person, immediately send a short summary by email or message: thanks for the call, here's what we agreed on scope, price and schedule, please confirm I understood correctly. Once the client replies in agreement, you have a written agreement. The same works for changes mid-project: confirm every change in writing before you continue working.

#From agreement to smooth invoicing

A good agreement makes invoicing straightforward: you invoice the agreed price on the agreed terms, and the invoice lines match the agreement's content. When you invoice through Truster, you don't need to set up a company or handle paperwork: you make the agreement in your own name as a light entrepreneur, invoice the agreed amount, and Truster takes care of sending the invoice, paying your wages and handling taxes. Truster Turva is included with the service, so you're covered by insurance while you work.

In short: make a written agreement for every job, however small. Record the scope of work, price and payment terms, schedule, how changes are handled, and each party's responsibilities. Always confirm verbally agreed matters in writing. A few minutes spent documenting things before work begins can save you, at worst, weeks of disputes and unpaid invoices.

#Checklist before starting work

Go through this list before you spend a single hour on the job. Is the scope of work described precisely enough that an outsider would understand what's been agreed? Is it noted what's excluded from the price? Is the price unambiguous, with VAT treatment mentioned? Are payment terms, and installments for larger jobs, agreed? Is the schedule realistic and recorded? Does the client know what they need to deliver and by when? Has it been agreed how extra work will be priced? If the answer to any of these is no, complete the agreement before starting.

Also make sure you're agreeing with the right person. At companies, only someone with the proper authority can make agreements that are binding. If an employee is the one agreeing to the assignment with you, make sure they're authorized to commission the work. For private clients, make sure the person paying the invoice is the same person you agreed the work with — for example, in housing company work, the distinction between a resident and the housing company itself matters.

#When the agreement needs to change mid-project

Few projects go exactly as planned, and that's normal. Problems only arise when changes are made without agreement. When a client asks for a change or addition, pause for a moment before promising anything: assess how much extra work the change requires and whether it affects the schedule. Tell the client the impact on price and timeline, and get written approval before proceeding. This isn't bureaucracy — it benefits both sides: the client knows what they're getting and what it costs, and you get paid for all the work you do.

The same applies when you yourself notice that the original plan isn't working: tell the client right away, propose a solution, and agree on the change in writing. Being open about problems builds more trust than hiding them. The worst client disputes arise when a problem only comes to light at the handover stage, when it could have been fixed cheaply weeks earlier.

Keep all messages and documents related to the agreement organized throughout the client relationship and afterward too. An email folder or cloud storage folder per client is enough. If a disagreement surfaces months later, a well-kept message thread usually resolves things quickly and without conflict.