Build the case before you need it
The strongest raise conversations are won in the six months before they happen. What makes them work is a documented record of contribution that your manager does not have to take on trust.
Keep a running file. Every time something goes well, note the date, what you did, and the outcome — ideally with a number. The project you delivered, the process you fixed, the client who stayed, the extra responsibility you absorbed when someone left, the figure your manager quoted in a meeting.
By the time you ask, you should be able to produce a single page listing what has changed since your salary was last set. Not a list of tasks; a list of things that are now true because of you. This is also exactly what your manager needs in order to argue your case upwards, which is usually where the real decision happens.
Know the market rate
Your sense that you are underpaid is not evidence. The market rate for your role, in your country, at your level, is.
Check several sources and pay attention to how the number moves with location, sector and company size. A national average is often badly misleading if you work in an expensive capital. If you can, talk to people doing similar work, and read the salary ranges in current job adverts for your own role — those are what your employer would have to pay to replace you.
That last figure is the quiet centre of gravity in any raise conversation. You do not need to say it out loud as a threat. You simply need to know it, because it will make your number sound like a fact rather than a hope.
Time it deliberately
Timing changes outcomes more than eloquence does. Ask at the wrong point in the cycle and the honest answer is that the money is already allocated.
Find out when salary decisions are actually made in your organisation — often a month or two before the financial year starts — and open the conversation before that window closes. Waiting for your formal review is usually too late; by then the numbers are set.
Within that, choose a good local moment: shortly after you have delivered something visible, when your manager is not in the middle of a crisis, and not immediately after bad company results. Ask for a dedicated meeting rather than raising it at the end of a one-to-one about something else. "I would like to book half an hour to talk about my role and compensation" is enough notice for them to prepare too, which works in your favour.
Ask for a specific number
Vagueness is expensive. "I was hoping for a raise" invites whatever the smallest defensible increase is. A specific figure, justified, invites a real negotiation.
Structure the conversation simply. Open with the fact that you are committed and enjoying the work. Summarise what has changed since your salary was set, with two or three concrete examples. State the market range you have researched. Then name your figure and stop talking.
"Since we set my salary I have taken on the regional reporting and led the migration, which came in ahead of schedule. Comparable roles in this market are paying between X and Y. I would like to move to Z. How do you feel about that?"
Then let the silence sit. Do not soften it, do not fill it, do not negotiate against yourself before they have responded.
Keep the argument about work
There is one category of reasoning that reliably weakens a request: your personal circumstances. Rent has gone up, the mortgage is expensive, you have a new baby, you have not had a raise in three years.
All of that may be true and none of it is an argument your manager can take upstairs. Budgets are justified by contribution and market rate, not need. A manager who wants to help you cannot build a case out of your expenses.
Equally, avoid comparing yourself to a specific colleague. Even where you are right, it shifts the conversation onto someone else's pay, which your manager cannot discuss, and it makes you sound like you have been comparing payslips rather than delivering results.
Handle the answer you actually get
There are three realistic outcomes and each has a correct next move.
If it is yes, confirm the details in writing — the new figure and the date it takes effect — and thank them properly. Do not immediately ask for something else.
If it is a partial yes, decide in the room whether it is acceptable, and if it is, ask what would be needed to close the remaining gap and when that could be reviewed.
If it is no, do not argue in the moment. Ask the one question that turns a refusal into a plan: "I understand. Can we agree specifically what I would need to demonstrate to reach that figure, and put a date on reviewing it?" Then send a short email summarising what you agreed. A manager who will not engage with even that question has told you something significant about your prospects there.
Know what you will do if nothing changes
Decide before the meeting what a no means to you, because deciding afterwards, emotionally, leads to bad choices.
For some people a no is fine — the role has other compensations, or the timing is genuinely poor. For others it is the signal to start looking. Either is a legitimate conclusion; drifting without deciding is not.
One caution: do not use an external offer as leverage unless you are genuinely prepared to take it. Counter-offers frequently come with a quiet mark against your name, and a significant proportion of people who accept one have left within a year anyway. If you go looking and find something better, the cleanest outcome is usually to take it.