Discovering you're paid £15-20k less than peers doing the same job is one of the more common professional shocks for women in their 30s. The standard advice ('demonstrate your value', 'show your achievements') doesn't address the real problem — the gap is structural, and closing it requires a different conversation.
Why the achievement-based ask falls short
Manager hears: 'You think you deserve more.' Reflects on your work. Maybe agrees, gives 3-5% rise. Gap persists. The problem isn't that they don't value your work — it's that the baseline was wrong.
The market-rate ask that actually works
'I've been doing market research on my role. Based on Glassdoor, recent recruitment conversations, and discussions with peers in similar positions, the market rate for this role is £85-95k. I'm currently at £68k. I'd like to discuss bringing my compensation in line with market.'
This reframes the conversation. It's not about your worth — it's about a market discrepancy. Manager hears: 'There's a benchmarking issue. If we don't address this, she'll leave.'
Preparing the data
Glassdoor for general benchmarks. LinkedIn Salary Insights for your specific company sometimes. Levels.fyi for tech roles with detail. Recruiters' conversations — accept calls even if not job-hunting, ask 'what's the market for this role'. Peer conversations — within company if culture allows, with peers at other companies if not.
If they say no
Get the no in writing. Decide whether to stay or leave. The data you've gathered is now your job-search benchmark. Companies that won't address a clear underpayment usually don't have other reasons to stay either.
Being underpaid isn't a feedback issue. It's a benchmarking issue. Frame the conversation that way and outcomes change.