Scenario: When you set up your expense split, you were earning similar amounts. Now one of you got a big raise — or lost a job. The old split doesn't feel right anymore.
When to revisit your split
Not every change requires a conversation, but these usually do:
- Significant raise or promotion: 10%+ increase in one person's income.
- Job loss or reduced hours: Any drop that strains one person's ability to pay.
- Parental leave: Temporary income reduction that can last months.
- Going back to school: Reduced income plus new expenses.
- Starting a business: Variable or reduced income during the startup phase.
- Retirement or semi-retirement: Permanent income change.
The trigger isn't just math — it's when the current split starts feeling unfair to either person.
Two approaches to income-based adjustments
Approach 1: Periodic recalculation
You keep a fixed split (say, 55/45) and recalculate when income changes significantly.
How it works:
- Set a trigger: "We'll revisit if either income changes by more than 10%."
- When triggered, recalculate based on new income ratio.
- New split takes effect next month.
Pros: Stability — you're not constantly adjusting.
Cons: Can feel outdated if changes happen gradually.
Approach 2: Rolling proportional split
Your split is always based on current income, recalculated monthly or quarterly.
How it works:
- Each period, calculate income shares.
- Split shared costs accordingly.
- Adjusts automatically as income fluctuates.
Pros: Always reflects current reality.
Cons: More tracking; can feel unstable if income varies a lot.
The conversation (a script that works)
Income conversations can feel loaded. Here's a low-drama opener:
"Hey, our income situation has changed since we set up our split. I want to make sure our arrangement still feels fair to both of us. Can we do a quick check-in?"
Then discuss:
- What's changed (new job, raise, job loss, etc.)
- How the current split is feeling for each person
- What adjustment (if any) would feel fair
The goal isn't to "win" — it's to find something you both feel good about.
Special cases
Job loss
When one person loses income unexpectedly:
- Short-term (1-3 months): Many couples cover for each other without formal adjustment. The working partner picks up more temporarily.
- Longer-term: Adjust the split to reflect new income reality. Consider setting a "review date" to reassess.
- Emergency fund: If you have one, this is what it's for.
Parental leave
Income often drops significantly during parental leave:
- Calculate expected income during leave (EI payments, employer top-up, etc.)
- Adjust split for the leave period.
- Set a date to return to normal split when income resumes.
Big raise for one person
This can be surprisingly awkward. The person with the raise might feel guilty; the other might feel left behind.
- Option 1: Adjust proportionally — higher earner pays a larger share.
- Option 2: Keep the split, but higher earner covers more discretionary spending (dinners, travel).
- Option 3: Keep the split, and higher earner saves/invests the difference.
There's no right answer — just what feels fair to both of you.
What to document
When you adjust your split, write down:
- New split: What percentage each person pays.
- Effective date: When the new split starts.
- Trigger for next review: What would prompt another conversation.
Practical takeaways
- Set a trigger: Agree on what income change prompts a conversation (e.g., 10-15%).
- Choose your approach: Periodic recalculation or rolling proportional.
- Have the conversation early: Don't wait until resentment builds.
- Focus on fairness, not math: The goal is for both people to feel good about the arrangement.
- Document the new split: Prevents "I thought we agreed..." later.
How Partnered helps
Partnered lets you adjust split rules anytime. Change your income ratio, and the system recalculates who owes what going forward. No spreadsheet gymnastics required.
Education only — not legal or financial advice. For complex situations (like long-term disability or major life changes), consider consulting a financial professional.