Financial clarity changes everything.
Plan with confidence.
Most finance apps show you where your money went. Coastline helps you model where it can take you — across major life decisions, taxes, retirement, and investing.
A financial planning workspace you'll actually want to spend time in. Preview the app in any theme below.
Scenario Modeling
Ask the questions that actually matter
Coastline lets you test the financial decisions that shape your future — before they become real.
"What if I buy a house in 2027 vs 2029?"
Model the down payment impact, mortgage scenarios, and how timing affects your net worth trajectory.
"Should I do a Roth conversion this year?"
See how converting at different amounts affects your tax bracket now and your tax-free growth over decades.
"Can I retire at 55 instead of 65?"
Model early retirement with withdrawal sequencing, Social Security timing, and healthcare gap costs.
"How does paying for college affect my timeline?"
Add life events like tuition, a new baby, or a career change and instantly see the ripple effect on your projections.
Long-term strategy
Plan every phase. Fund what matters.
From funding priorities to withdrawal sequencing — Coastline gives you the tools to build a strategy that spans your entire financial life.
Funding map
Follow every dollar to retirement
Visualize how gross income flows through taxes, expenses, debt, and savings across every year of your financial plan — from wealth building through full retirement.
Withdrawal plan
Withdraw with confidence
Model withdrawal sequencing across taxable, tax-deferred, and tax-free accounts — optimizing for tax efficiency and portfolio longevity.
Priority engine
Your strategy, every phase of life
Set funding and withdrawal priorities for each life stage — wealth building, catch‑up years, and retirement — with strategic actions like Roth conversions built in.
One platform for the decisions that shape your future
Projections, tax analytics, withdrawals, portfolio tracking, and cash flow — working together in one system designed for long‑term financial planning.
Financial Projections
Model major financial decisions and see how they change your long‑term net worth, taxes, and retirement timeline.
Tax Analytics
Explore Roth conversions, tax bracket management, and capital gains strategies with analysis designed for long‑term planning.
Withdrawal Modeling
Retirement changes the strategy. Explore withdrawal sequencing across accounts and see how different approaches affect taxes and longevity.
Portfolio Analytics
Track allocation, performance, and account exposure across all your investments alongside your long‑term financial plan.
Automatic Account Syncing
Link your bank and investment accounts through Plaid and your balances, transactions, and holdings update automatically — no manual entry.
Budgeting & Cash Flow
Stay grounded in the fundamentals with budgeting, cash‑flow planning, and debt payoff tracking built into the same system.
Powered by Plaid
Your accounts, always up to date
Connect your banks and investment accounts once through Plaid, and Coastline keeps your balances, transactions, and holdings synced automatically.
Link Your Accounts
Securely connect checking, savings, credit cards, loans, and investment accounts through Plaid's trusted network.
Automatic Syncing
Balances, transactions, and holdings flow into Coastline automatically — no spreadsheets, no manual entry.
Plan With Real Data
Your projections, budgets, and portfolio analytics are always built on current numbers — not last month's guess.
12,000+
Banks & institutions supported
Automatic
Balance & transaction updates
Zero
Credentials stored by Coastline
Security & Privacy
Privacy isn't a feature. It's the foundation.
Every balance, transaction, and holding is encrypted before it's stored — not with a shared key, but with one that's unique to you.
- Encrypted in transit and at rest — all data is transmitted over TLS and stored as ciphertext on our servers
- Your key, your control — backed up to iCloud Keychain and protected by a passphrase only you know
- Secure account linking — bank credentials go straight to Plaid and are never seen by Coastline
Planning data like budgets, projections, and life events stays on your Mac and syncs through your personal iCloud.
AES‑256 encryption
Per‑user keys · Unique IV per field
Stop hoping. Start knowing.
Try Coastline free for 14 days and see how better modeling leads to better financial decisions.