Model your exact retirement income, pension contributions, and tax thresholds so you never leave money on the table.
Added Mar 7, 2026
People planning for retirement struggle to accurately project their future expenses, optimize pension contributions around tax thresholds (like the £100k adjusted net income cliff), and understand how different pension types (defined benefit, SIPP, AVC) interact with tax rules. Current spreadsheets and generic calculators fail to account for the interplay between salary sacrifice limits, bonus treatment, inheritance tax changes, and real vs. nominal return assumptions.
A comprehensive retirement planning tool that ingests your actual salary, pension schemes (DB, DC, SIPP, AVC), bonuses, and tax jurisdiction rules to automatically calculate optimal contribution levels, project retirement income under multiple inflation/return scenarios, and flag tax-saving opportunities like bringing adjusted net income below key thresholds. The tool would provide actionable recommendations—such as exactly how much to contribute via personal pension when salary sacrifice isn't available for bonuses—and model upcoming regulatory changes like the 2027 UK pension inheritance tax inclusion.
Major pension tax rule changes (UK 2027 IHT inclusion of pensions, evolving annual allowance rules) are creating urgent demand for scenario-planning tools. Meanwhile, the FIRE movement continues to grow, and younger savers are increasingly seeking precise, personalized projections rather than generic rules of thumb like the '80% of pre-retirement income' guideline.
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Have been seriously looking at FIRE for a few months and have a question about estimated expenses. There doesn't seem to be a lot of consistency on how to estimate it. I saw a rule about 80% of pre-retirement and that seems like a lot. Our expenses are currently (from net income) \~65% mortgage / retirement savings / general savings \~10% kids I think it would be ok to live on 30% of our current income as mortgage should be paid off and kids will be out of the house (college savings are considered separately). But perhaps I should up that estimate due to inflation/healthcare/new cars/new roof? I guess those decadal expenses are typically absorbed into yearly estimates? mid-40s, would be great to FIRE in roughly 10 years. Are others also estimating based on current income or rather a ground up estimate based on expenses?
Keeping it rounded, can someone help me understand the following example If someone has a 100k salary, and is due to receive a 15k bonus , and needs to decide to put some or all, into pension as AVC Assuming the person is not above their pension contribution age limit I understand that taking it in salary makes it subject to full taxes just like salary, but How does the 15k work in terms of the monetary benefit of going as AVC? As only options are pension or payment, no shares etc, is the pension option the more attractive option in terms of return?
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